Yes. Safe for septic tanks, greywater and package treatment plants. Short-chain polymers biodegrade and there's no chlorine bleach to harm bacteria. →

<article id="loo-cleaner-tabs-septic-safe" class="promo-article"><p><strong>TL;DR:</strong> Yes. <a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;"><strong>Loo Cleaner Tabs</strong></a> are safe for septic tanks, greywater systems, and package sewage treatment plants. The polymers in the formula are short-chain and biodegradable, so they break down through normal wastewater treatment rather than building up in your system. There is no chlorine bleach to harm the bacteria your tank relies on, and the dissolvable PVOH wrapper leaves no residue.</p><div style="display:flex; align-items:center; gap:12px; margin:1.5rem 0;"><div style="flex:1; height:1px; background:#A8C7E9;"><br></div><span style="font-size:11px; color:#185FA5; font-weight:500; letter-spacing:0.05em; text-transform:uppercase;">Read on &#x2193;</span><div style="flex:1; height:1px; background:#A8C7E9;"><br></div></div><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="margin:0;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/Koh_Safe-Loo_7738259f-04bb-4f95-a29d-ebef8dd0436c.jpg?width=400" alt="Koh Loo Cleaner Tabs safe for septic systems" style="width:100%; height:auto; border-radius:12px;" class="fr-fil fr-dib"></a></div><div style="margin:0;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/Koh_Simple_Brand-USPs-Lifestyle-Image-Loo_f5586ed1-f284-4306-92f7-39a175a090c6.jpg?width=400" alt="Koh Loo Cleaner Tabs key features" style="width:100%; height:auto; border-radius:12px;" class="fr-fil fr-dib"></a></div></div><hr><div itemscope itemtype="https://schema.org/FAQPage"><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="septic-safe"><h2 itemprop="name" style="position:absolute; left:-10000px; width:1px; height:1px; overflow:hidden;" id="are-loo-cleaner-tabs-safe-for-septic-environments">Are Loo Cleaner Tabs safe for septic environments?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">Yes. Koh Loo Cleaner Tabs are safe for use in standard household septic systems. The formula is designed to be septic compatible. The polymers in the tablet are short-chain rather than long-chain, which means they biodegrade through normal wastewater treatment instead of accumulating in your tank or drainage field. The cleaning agents, which include sodium bicarbonate, citric acid, sodium percarbonate and enzymes, break down naturally and contain no chlorine bleach, which is what disrupts the bacterial balance in a septic tank. Each tab is also wrapped in a cold water-soluble PVOH film that dissolves completely with no residue. The formula is free from chlorine bleach, synthetic fragrances, phosphates, and volatile organic compounds.</p><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;"><span style="color:#017E51;">&#x2713;</span> Septic safe by design</p><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">The polymers in the tablet are short-chain rather than long-chain. Long-chain polymers, used in many conventional toilet cleaners, can build up in a septic tank because they do not biodegrade easily. Short-chain polymers break down through normal wastewater treatment, so they leave the system the way the rest of the wastewater does. No chlorine bleach, no synthetic fragrances, no phosphates, no VOCs.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Short-chain polymers</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Biodegradable</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">No chlorine bleach</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">No tank build-up</span></div></div></div></div><hr><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="greywater-treatment-plants"><h2 itemprop="name" style="font-size:17px; font-weight:600; color:#0C447C; margin:1.5rem 0 0.5rem;" id="what-about-greywater-and-package-treatment-plants">What about greywater and package treatment plants?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">Yes, Koh Loo Cleaner Tabs are also safe for greywater systems and package sewage treatment plants, including BioCycle-style aerated units. Toilet flush water is technically blackwater rather than greywater, so it usually goes to the primary tank rather than to a greywater diversion line. The point that matters for treatment-plant owners is that the tablet contains no harsh disinfectants such as chlorine bleach or quaternary ammonium compounds, which are the things that harm the beneficial bacteria your plant relies on to process waste. The same applies to standard tank-and-soakaway septic systems and to worm-farm-based treatment systems. If your treatment plant manufacturer or installer has given you a list of approved cleaning products, treat that list as the final word.</p><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;"><span style="color:#017E51;">&#x2713;</span> Compatible wastewater systems</p><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">No chlorine bleach and no quaternary ammonium disinfectants, so the cleaning agents do not harm the beneficial bacteria your treatment system relies on. Always follow your treatment plant manufacturer&apos;s approved-product list as the final word.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Septic tank</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Greywater</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Package treatment plants</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Worm-farm systems</span></div></div></div></div><hr><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="wrapper-residue"><h2 itemprop="name" style="font-size:17px; font-weight:600; color:#0C447C; margin:1.5rem 0 0.5rem;" id="will-the-wrapper-or-any-residue-build-up-in-my-tank">Will the wrapper or any residue build up in my tank?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">No. Each Loo Cleaner Tab is wrapped in a cold water-soluble PVOH film. The wrapper dissolves completely on contact with toilet water, leaves no residue, and is biodegradable. It does not need removing before use and adds no plastic to your septic tank or to the wastewater system. The same PVOH technology is used in dishwasher and laundry tablets. The tablet itself also dissolves fully when used as directed, which means dropping it into standing water and letting it fizz out for a few minutes. Let the fizzing finish before you scrub or flush, because a partially dissolved tablet can block plumbing.</p><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;"><span style="color:#017E51;">&#x2713;</span> The wrapper dissolves completely</p><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">Cold water-soluble PVOH film, the same technology used in dishwasher and laundry tablets. It dissolves on contact with toilet water, leaves no residue, and is biodegradable. The tablet itself dissolves fully when used as directed. Let the fizzing finish before flushing, because a partially dissolved tablet can block plumbing.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">PVOH film</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Cold water-soluble</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">No residue</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Biodegradable</span></div></div><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">Full detail in <a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-wrapper-349690" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">Should I remove the wrapper on the Loo Cleaner Tab?</a>.</p></div></div><hr><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="versus-bleach-tablets"><h2 itemprop="name" style="font-size:17px; font-weight:600; color:#0C447C; margin:1.5rem 0 0.5rem;" id="how-do-they-compare-with-bleach-based-loo-tablets">How do they compare with bleach-based loo tablets?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">Bleach-based toilet tablets, meaning those built on sodium hypochlorite, and blue-water cistern blocks are generally not recommended for septic systems. The chlorine harms the beneficial bacteria that your septic tank or treatment plant depends on to break down waste, which slows the system&apos;s processing capacity and can shorten its service life. Many treatment plant manufacturers warn against chlorine-based cleaners specifically. Koh Loo Cleaner Tabs use oxygen-based bleaching from sodium percarbonate, which releases hydrogen peroxide on contact with water, alongside enzymes and citric acid. Hydrogen peroxide breaks down into water and oxygen and does not have the same effect on the bacterial balance of a properly functioning septic tank when used as directed.</p><div style="background:#FAEEDA; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#633806; margin:0 0 10px;"><span style="color:#633806;">&#x26A0;</span> Avoid chlorine-bleach tablets on septic</p><p style="font-size:13px; color:#854F0B; margin:0 0 10px; line-height:1.6;">Chlorine bleach tablets and blue-water cistern blocks harm the beneficial bacteria in septic tanks and package treatment plants, which slows wastewater processing and can shorten the system&apos;s service life. Many treatment plant manufacturers warn against chlorine-based cleaners specifically. Loo Cleaner Tabs use oxygen-based bleaching from sodium percarbonate instead, which breaks down into water and oxygen.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#633806; background:#FFF36E; border-radius:20px; padding:3px 10px;">No chlorine bleach</span> <span style="font-size:12px; font-weight:500; color:#633806; background:#FFF36E; border-radius:20px; padding:3px 10px;">Oxygen-based bleaching</span> <span style="font-size:12px; font-weight:500; color:#633806; background:#FFF36E; border-radius:20px; padding:3px 10px;">Bacteria-friendly</span></div></div></div></div></div><hr><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="display:flex; flex-direction:column;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/1.Koh_Product_Still_Loo-Cleaner-Tablets.jpg?width=400" alt="Koh Loo Cleaner Tabs 14 pack" style="width:100%; height:auto; border-radius:12px 12px 0 0;" class="fr-fil fr-dib"></a><div style="background:#E6F1FB; padding:1rem 1.25rem; border-radius:0 0 12px 12px; flex:1; display:flex; flex-direction:column;"><p style="font-size:13px; font-weight:500; color:#0C447C; margin:0 0 4px;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;"><strong>Loo Cleaner Tabs 14pk</strong></a></p><p style="font-size:12px; color:#185FA5; margin:0 0 10px; line-height:1.5;">Septic, greywater, and package-treatment-plant safe. Short-chain polymers, no chlorine bleach.</p><div style="display:flex; flex-wrap:wrap; gap:8px; margin-top:auto;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#000000; text-decoration:none; background:#ffffff; border:1.5px solid #000000; border-radius:20px; padding:5px 14px;">View product</a><a href="https://uk.koh.com/cart/add?id=41842314739757&amp;quantity=1" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#ffffff; text-decoration:none; background:#000000; border-radius:20px; padding:6px 14px;">Add to cart</a></div></div></div><div style="display:flex; flex-direction:column;"><a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/1.Koh_Product-Still_LooBlade_Char.jpg?width=400" alt="Koh Loo Blade with ceramic pot" style="width:100%; height:auto; border-radius:12px 12px 0 0;" class="fr-fil fr-dib"></a><div style="background:#E6F1FB; padding:1rem 1.25rem; border-radius:0 0 12px 12px; flex:1; display:flex; flex-direction:column;"><p style="font-size:13px; font-weight:500; color:#0C447C; margin:0 0 4px;"><a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;"><strong>Loo Blade</strong></a></p><p style="font-size:12px; color:#185FA5; margin:0 0 10px; line-height:1.5;">The compatible scrub tool. TPE blade with a handmade ceramic pot for storage.</p><div style="display:flex; flex-wrap:wrap; gap:8px; margin-top:auto;"><a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#000000; text-decoration:none; background:#ffffff; border:1.5px solid #000000; border-radius:20px; padding:5px 14px;">View product</a><a href="https://uk.koh.com/cart/add?id=41680152035373&amp;quantity=1" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#ffffff; text-decoration:none; background:#000000; border-radius:20px; padding:6px 14px;">Add to cart</a></div></div></div></div><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;">More on Loo Cleaner Tabs</p><ul style="font-size:13px; color:#185FA5; margin:0; padding-left:1.1rem; line-height:1.6;"><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-how-to-use-349687" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">How to use Loo Cleaner Tabs</a></li><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-fragrance-349688" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">Do Loo Cleaner Tabs have a fragrance?</a></li><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-wrapper-349690" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">Should I remove the wrapper on the Loo Cleaner Tab?</a></li><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-ingredients-2858270" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">What are the ingredients of the Loo Cleaner Tabs?</a></li></ul></div><p style="text-align:center; margin:1.25rem 0 0;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Farticles%2Floo-cleaner-tabs-266852" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#000000; text-decoration:none; background:#ffffff; border:1.5px solid #000000; border-radius:20px; padding:5px 14px;">Browse all Loo Cleaner Tabs articles</a></p><p style="font-size:11px; color:#185FA5; text-align:center; margin:1rem 0 0;">Last reviewed: August 2026 &#xB7; Koh UK</p><p style="display:none;">are loo cleaner tabs septic safe uk, koh loo cleaner tabs septic tank, loo cleaner tabs septic, loo cleaner tabs greywater, loo cleaner tabs grey water, loo cleaner tabs sewage treatment plant, loo cleaner tabs package treatment plant, loo cleaner tabs biocycle, loo cleaner tabs cesspit, loo cleaner tabs short chain polymers, loo cleaner tabs long chain polymers, loo cleaner tabs no bleach, koh toilet tabs septic safe, septic safe toilet cleaner uk, loo cleaner tabs septic bacteria, loo cleaner tabs wrapper septic, loo cleaner tabs no phosphates, loo cleaner tabs no vocs</p></article>

Are Loo Cleaner Tabs safe for septic environments?

Drop one tab in, let it fizz, scrub with Loo Blade, let it sit, then flush. Repeat weekly. For build-up, soak overnight with a Diamond Sponge instead. →

How to use Loo Cleaner Tabs

No. Fragrance-free, with no perfumes or masking agents, and Sensitive Choice approved. Add 2-3 drops of essential oil to the bowl for a scent. →

Do Loo Cleaner Tabs have a fragrance?

No. Leave the wrapper on and drop the tab in as is. The cold water-soluble PVOH film dissolves fully and keeps the concentrate off your skin. →

<article id="loo-cleaner-tabs-wrapper" class="promo-article"><p><strong>TL;DR:</strong> No. Leave the wrapper on and drop <a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;"><strong>Loo Cleaner Tabs</strong></a> straight into the bowl or cistern, wrapper and all. The cold water-soluble PVOH (polyvinyl alcohol) film dissolves completely, leaves no residue, and is biodegradable. It is there to keep the concentrated cleaning powder off your skin and to keep the formula stable until it hits water. The same technology is used in laundry and dishwasher tablets.</p><div style="display:flex; align-items:center; gap:12px; margin:1.5rem 0;"><div style="flex:1; height:1px; background:#A8C7E9;"><br></div><span style="font-size:11px; color:#185FA5; font-weight:500; letter-spacing:0.05em; text-transform:uppercase;">Read on &#x2193;</span><div style="flex:1; height:1px; background:#A8C7E9;"><br></div></div><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="margin:0;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/1.Koh_Product_Still_Loo-Cleaner-Tablets.jpg?width=400" alt="Koh Loo Cleaner Tabs individually wrapped tablets" style="width:100%; height:auto; border-radius:12px;" class="fr-fil fr-dib"></a></div><div style="margin:0;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/Koh_Effective-ProblemsSolution-Loo_4c1852ac-5791-4724-96a7-59f9f0232181.jpg?width=400" alt="Koh Loo Cleaner Tab dissolving in the bowl" style="width:100%; height:auto; border-radius:12px;" class="fr-fil fr-dib"></a></div></div><hr><div itemscope itemtype="https://schema.org/FAQPage"><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="leave-the-wrapper-on"><h2 itemprop="name" style="position:absolute; left:-10000px; width:1px; height:1px; overflow:hidden;" id="should-i-remove-the-wrapper-on-the-loo-cleaner-tab">Should I remove the wrapper on the Loo Cleaner Tab?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">No. Leave the wrapper on and drop the tab straight into the toilet bowl or cistern, wrapper and all. The wrapper is part of the product and dissolves away as soon as it hits the water. Removing it is not needed and is not recommended. The film is a thin cold water-soluble PVOH layer, short for polyvinyl alcohol, designed to encapsulate the concentrated cleaning powder inside the tab. That keeps the concentrate off your hands, because direct contact with the powder can irritate skin. The wrapper also keeps the cleaning agents stable in storage so the tab performs as designed when you drop it in. The same wrapper technology is used in laundry and dishwasher tablets. If you accidentally tear the wrapper before dropping the tab in water, drop it into the bowl as soon as you can and wash your hands.</p><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;"><span style="color:#017E51;">&#x2713;</span> Leave the wrapper on</p><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">Drop the tab into the bowl or cistern exactly as it comes. The wrapper dissolves with the tab and leaves no residue. It is there to keep the concentrated cleaning powder off your skin and to keep the formula stable in storage.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Leave the wrapper on</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Drop in as-is</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Dissolves with the tab</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">No residue</span></div></div><div style="background:#FAEEDA; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#633806; margin:0 0 10px;"><span style="color:#633806;">&#x26A0;</span> Don&apos;t unwrap the tab or handle the bare powder</p><p style="font-size:13px; color:#854F0B; margin:0 0 10px; line-height:1.6;">Taking the wrapper off puts your hands in direct contact with the concentrated cleaning powder, which can irritate skin. Do not open, cut, or peel the wrapper. If one tears by accident, drop the tab into the bowl straight away and wash your hands. Keep tabs dry and out of reach of children and pets, and do not flush a tab that has not fully dissolved.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#633806; background:#FFF36E; border-radius:20px; padding:3px 10px;">Do not unwrap</span> <span style="font-size:12px; font-weight:500; color:#633806; background:#FFF36E; border-radius:20px; padding:3px 10px;">Wash hands if torn</span> <span style="font-size:12px; font-weight:500; color:#633806; background:#FFF36E; border-radius:20px; padding:3px 10px;">Keep dry and out of reach</span></div></div></div></div><hr><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="what-is-pvoh"><h2 itemprop="name" style="font-size:17px; font-weight:600; color:#0C447C; margin:1.5rem 0 0.5rem;" id="what-is-the-pvoh-wrapper-made-of">What is the PVOH wrapper made of?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">PVOH stands for polyvinyl alcohol. It is a water-soluble polymer used widely as a protective film in laundry tablets, dishwasher tablets, and toilet cleaning tablets. The film used in Koh Loo Cleaner Tabs is a cold water-soluble grade, formulated to break down rapidly even in unheated water. On contact with water the film breaks apart at the molecular level and dissolves completely. PVOH is often called PVA in everyday industry use, though strictly speaking PVA refers to a different polymer, polyvinyl acetate. On cleaning product labels, PVA wrapper and PVOH wrapper mean the same water-soluble film. The film is biodegradable and dissolves rapidly, so it does not persist in aquatic ecosystems. It dissolves in cistern water too, so the cleaning solution flushes through cleanly if you use the cistern method.</p><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;"><span style="color:#017E51;">&#x2713;</span> Water-soluble and biodegradable</p><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">PVOH, polyvinyl alcohol, is a water-soluble polymer used widely in laundry and dishwasher tablets. The film in Loo Cleaner Tabs is a cold water-soluble grade. It is also called PVA in casual use, though technically PVOH. It dissolves completely in water, leaves no residue, and is biodegradable.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Water soluble</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Biodegradable</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">No residue</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Cold water grade</span></div></div></div></div><hr><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="wrapper-septic-environment"><h2 itemprop="name" style="font-size:17px; font-weight:600; color:#0C447C; margin:1.5rem 0 0.5rem;" id="is-the-wrapper-safe-for-septic-systems-and-the-environment">Is the wrapper safe for septic systems and the environment?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">Yes. The PVOH wrapper used in Koh Loo Cleaner Tabs is biodegradable and dissolves fully in water, leaving no residue. It does not accumulate in septic tanks, does not harm the beneficial bacteria your septic system relies on, and dissolves rapidly rather than persisting in aquatic ecosystems. That removes the microplastic concern often raised about plastic packaging. Koh&apos;s wider septic-safe credentials carry through to the wrapper as well: no chlorine bleach, no phosphates, no synthetic fragrances, and no volatile organic compounds.</p><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;"><span style="color:#017E51;">&#x2713;</span> Septic safe and environmentally sound</p><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">PVOH dissolves fully in water and biodegrades through normal wastewater treatment and in septic systems. No tank accumulation and no harm to septic bacteria. Rapid dissolution removes the microplastic concern often raised about plastic packaging.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Septic safe</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Bacteria friendly</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Fully breaks down</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">No microplastic build-up</span></div></div><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">More on the wider formula in <a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-septic-safe-349686" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">Are Loo Cleaner Tabs safe for septic environments?</a>.</p></div></div><hr><div itemprop="mainEntity" itemscope itemtype="https://schema.org/Question" id="dissolve-time"><h2 itemprop="name" style="font-size:17px; font-weight:600; color:#0C447C; margin:1.5rem 0 0.5rem;" id="how-long-does-the-wrapper-take-to-dissolve">How long does the wrapper take to dissolve?</h2><div itemprop="acceptedAnswer" itemscope itemtype="https://schema.org/Answer"><p itemprop="text" style="display:none;">The wrapper is a cold water-soluble PVOH grade, so it dissolves rapidly even in unheated toilet water. Most of the film breaks apart within the first minute or two of contact, with full dissolution typically complete within a few minutes. Warm water dissolves the film noticeably faster, and the fizzing from the dissolving tab helps agitate the wrapper and speed the breakdown. In a very cold house in winter, where the cistern water sits well below room temperature, you may notice slightly longer dissolve times. Either way, by the time you have finished scrubbing with the Loo Blade and the solution has had its few minutes to work, the wrapper is fully dissolved with no trace.</p><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0; display:flex; flex-direction:column;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;"><span style="color:#017E51;">&#x2713;</span> Dissolves in minutes</p><p style="font-size:13px; color:#185FA5; margin:0 0 10px; line-height:1.6;">Most of the film breaks apart in the first minute or two of contact, with full dissolution typically complete within a few minutes and faster in warm water. The tab&apos;s own fizz agitates the wrapper and speeds the breakdown. By the time you have finished scrubbing, the wrapper is gone.</p><div style="display:flex; flex-wrap:wrap; gap:6px; margin-top:auto;"><span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Cold water-soluble</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Faster in warm water</span> <span style="font-size:12px; font-weight:500; color:#0C447C; background:#A8C7E9; border-radius:20px; padding:3px 10px;">Fizz aids breakdown</span></div></div></div></div></div><hr><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="display:flex; flex-direction:column;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/1.Koh_Product_Still_Loo-Cleaner-Tablets.jpg?width=400" alt="Koh Loo Cleaner Tabs 14 pack" style="width:100%; height:auto; border-radius:12px 12px 0 0;" class="fr-fil fr-dib"></a><div style="background:#E6F1FB; padding:1rem 1.25rem; border-radius:0 0 12px 12px; flex:1; display:flex; flex-direction:column;"><p style="font-size:13px; font-weight:500; color:#0C447C; margin:0 0 4px;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;"><strong>Loo Cleaner Tabs 14pk</strong></a></p><p style="font-size:12px; color:#185FA5; margin:0 0 10px; line-height:1.5;">Individually wrapped tablets with a cold water-soluble PVOH wrapper. Drop in, fizz, scrub, flush.</p><div style="display:flex; flex-wrap:wrap; gap:8px; margin-top:auto;"><a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#000000; text-decoration:none; background:#ffffff; border:1.5px solid #000000; border-radius:20px; padding:5px 14px;">View product</a><a href="https://uk.koh.com/cart/add?id=41842314739757&amp;quantity=1" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#ffffff; text-decoration:none; background:#000000; border-radius:20px; padding:6px 14px;">Add to cart</a></div></div></div><div style="display:flex; flex-direction:column;"><a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer"><img src="https://uk.koh.com/cdn/shop/files/1.Koh_Product-Still_LooBlade_Char.jpg?width=400" alt="Koh Loo Blade with ceramic pot" style="width:100%; height:auto; border-radius:12px 12px 0 0;" class="fr-fil fr-dib"></a><div style="background:#E6F1FB; padding:1rem 1.25rem; border-radius:0 0 12px 12px; flex:1; display:flex; flex-direction:column;"><p style="font-size:13px; font-weight:500; color:#0C447C; margin:0 0 4px;"><a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;"><strong>Loo Blade</strong></a></p><p style="font-size:12px; color:#185FA5; margin:0 0 10px; line-height:1.5;">TPE blade with a handmade ceramic pot for storage. Pairs with Loo Cleaner Tabs.</p><div style="display:flex; flex-wrap:wrap; gap:8px; margin-top:auto;"><a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#000000; text-decoration:none; background:#ffffff; border:1.5px solid #000000; border-radius:20px; padding:5px 14px;">View product</a><a href="https://uk.koh.com/cart/add?id=41680152035373&amp;quantity=1" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#ffffff; text-decoration:none; background:#000000; border-radius:20px; padding:6px 14px;">Add to cart</a></div></div></div></div><div style="background:#E6F1FB; border-radius:12px; padding:1.25rem; margin:1rem 0;"><p style="font-size:14px; font-weight:500; color:#0C447C; margin:0 0 10px;">More on Loo Cleaner Tabs</p><ul style="font-size:13px; color:#185FA5; margin:0; padding-left:1.1rem; line-height:1.6;"><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-how-to-use-349687" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">How to use Loo Cleaner Tabs</a></li><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-septic-safe-349686" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">Are Loo Cleaner Tabs safe for septic environments?</a></li><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-fragrance-349688" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">Do Loo Cleaner Tabs have a fragrance?</a></li><li style="margin:0 0 6px;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Floo-cleaner-tabs-ingredients-2858270" target="_blank" rel="noopener noreferrer" style="color:#0C447C; text-decoration:none;">What are the ingredients of the Loo Cleaner Tabs?</a></li></ul></div><p style="text-align:center; margin:1.25rem 0 0;"><a href="https://uk.koh.com/pages/help-centre?hcUrl=%2Fen-US%2Farticles%2Floo-cleaner-tabs-266852" target="_blank" rel="noopener noreferrer" style="display:inline-block; font-size:12px; font-weight:700; color:#000000; text-decoration:none; background:#ffffff; border:1.5px solid #000000; border-radius:20px; padding:5px 14px;">Browse all Loo Cleaner Tabs articles</a></p><p style="font-size:11px; color:#185FA5; text-align:center; margin:1rem 0 0;">Last reviewed: August 2026 &#xB7; Koh UK</p><p style="display:none;">should i remove the wrapper on loo cleaner tab, do i remove the wrapper loo cleaner tabs, koh loo cleaner tabs wrapper, loo cleaner tabs unwrap, loo cleaner tabs pva wrapper, loo cleaner tabs pvoh wrapper, loo cleaner tabs polyvinyl alcohol, loo cleaner tabs water soluble wrapper, loo cleaner tabs dissolvable wrapper, loo cleaner tabs biodegradable wrapper, loo cleaner tabs plastic wrapper, loo cleaner tabs microplastic, is loo cleaner tab wrapper safe, loo cleaner tabs torn wrapper, loo cleaner tabs skin irritation, loo cleaner tabs wrapper septic, loo cleaner tabs wrapper dissolve time</p></article>

Should I remove the wrapper on the Loo Cleaner Tab?

Fourteen declared ingredients plus a dissolvable PVOH wrapper: bicarbonate, citric acid, percarbonate and enzymes. No chlorine bleach, no fragrance. →

What are the ingredients of the Loo Cleaner Tabs?

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Find out everything about Loo Cleaner Tabs: septic-friendly fizzing enzymes, oxygen bleach stain-busting power, fragrance-free formula, biodegradable film. You’ll learn how to use, store, and love your Loo Tabs.

Loo Cleaner Tabs

Bathroom products

Your weekly loo glow-up starts here! 🚽✨ Get instant answers on septic-safe fizz, fragrance-free formula, no-unwrap convenience, enzyme power, and oxygen bleach for a spotless loo.

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Universal Cleaner

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Bathroom & Shower Cleaner

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Dishwashing Tablets

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Dishwashing Liquid

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Kitchen Grease & Oil Cleaner

Kitchen products

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Sensitive Laundry Liquid

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