Safe for your toilet and your tank. 💧 Our Loo Cleaner Tabs are septic-friendly and free from the usual nasties.

<p>Yes! <a href="https://uk.koh.com/products/loo-cleaner-tablets"><strong>Loo Cleaner Tabs</strong></a> are formulated to be <strong>safe for septic systems</strong>. They are free from chemicals typically understood to be harmful to septic environments, including:</p><p style="margin-left: 20px;">&#x274C; Bleach</p><p style="line-height: 1; margin-left: 20px;">&#x274C; Synthetic fragrances</p><p style="line-height: 1; margin-left: 20px;">&#x274C; Phosphates</p><p style="line-height: 1; margin-left: 20px;">&#x274C; Volatile organic compounds (VOCs)</p><p>Additionally, while our Loo Cleaner Tabs do contain polymers, they <strong>are not classified as long-chain polymers</strong>, which are often a concern for grey water systems.</p><p>If you have any specific concerns about your septic or grey water system, we recommend consulting your service provider to ensure compatibility with your setup.</p>

Are Loo Cleaner Tabs safe for septic environments?

Drop one tab into the toilet bowl, let it fizz, scrub under the rim, let it sit a few minutes, then flush. Repeat weekly →

<article id="how-to-use-loo-cleaner-tabs" class="promo-article"><p><strong>TL;DR:</strong> <a href="https://uk.koh.com/products/loo-cleaner-tablets" target="_blank" rel="noopener noreferrer" style="color:#085041; text-decoration:none;"><strong>Loo Cleaner Tabs</strong></a> go straight into the bowl or cistern. Let them fizz for 10-15 minutes, scrub the bowl with <a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer" style="color:#085041; text-decoration:none;"><strong>Loo Blade</strong></a>, then flush. For stubborn build-up, leave the tab longer or use a <a href="https://uk.koh.com/products/diamond-sponges" target="_blank" rel="noopener noreferrer" style="color:#085041; text-decoration:none;"><strong>Diamond Sponge</strong></a>.</p><div style="display:flex; align-items:center; gap:12px; margin:1.5rem 0;"><div style="flex:1; height:1px; background:#A3D6B1;"><br></div><span style="font-size:11px; color:#0F6E56; font-weight:500; letter-spacing:0.05em; text-transform:uppercase;">How it works</span><div style="flex:1; height:1px; background:#A3D6B1;"><br></div></div><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="background:#E1F5EE; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">1. Drop in the tab</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Place one tab in the bowl or cistern tank.</p></div><div style="background:#E1F5EE; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">2. Let it fizz</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Wait 10-15 minutes. For heavier soils, leave it longer or overnight.</p></div><div style="background:#E1F5EE; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">3. Scrub and flush</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Scrub under the rim with <a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer" style="color:#085041; text-decoration:none;"><strong>Loo Blade</strong></a> and flush to finish.</p></div></div><hr><div itemprop="mainEntity" id="how-to-use"><h2 itemprop="name" id="how-do-i-use-loo-cleaner-tabs">How do I use Loo Cleaner Tabs?</h2><div itemprop="acceptedAnswer"><p itemprop="text" style="display:none;">Drop one Loo Cleaner Tab into the loo bowl or cistern, let it fizz for 10-15 minutes, scrub the bowl thoroughly with Loo Blade, then flush. Repeat weekly for best results. For heavier grime, give it longer dwell time or use Diamond Sponge for extra help.</p><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="background:#F5FBF7; border:1px solid #A3D6B1; border-radius:12px; padding:1.25rem;"><p style="font-size:12px; font-weight:700; color:#0F6E56; margin:0 0 8px; text-transform:uppercase; letter-spacing:0.05em;">Where to place it</p><p style="font-size:14px; color:#085041; margin:0; line-height:1.6;">In the bowl or in the cistern tank.</p></div><div style="background:#F5FBF7; border:1px solid #A3D6B1; border-radius:12px; padding:1.25rem;"><p style="font-size:12px; font-weight:700; color:#0F6E56; margin:0 0 8px; text-transform:uppercase; letter-spacing:0.05em;">How long to wait</p><p style="font-size:14px; color:#085041; margin:0; line-height:1.6;">10-15 minutes is the sweet spot. Longer for heavy soils.</p></div><div style="background:#F5FBF7; border:1px solid #A3D6B1; border-radius:12px; padding:1.25rem;"><p style="font-size:12px; font-weight:700; color:#0F6E56; margin:0 0 8px; text-transform:uppercase; letter-spacing:0.05em;">Best add-on</p><p style="font-size:14px; color:#085041; margin:0; line-height:1.6;">Use <a href="https://uk.koh.com/products/loo-blade-charcoal" target="_blank" rel="noopener noreferrer" style="color:#085041; text-decoration:none;"><strong>Loo Blade</strong></a> to scrub the bowl and under the rim.</p></div></div></div></div><hr><div itemprop="mainEntity" id="heavy-grime"><h2 itemprop="name" id="what-if-the-toilet-has-heavy-build-up">What if the toilet has heavy build-up?</h2><div itemprop="acceptedAnswer"><p itemprop="text" style="display:none;">For badly aged or heavily soiled bowls, leave the tab in longer and add a Diamond Sponge to lift surface grime. Wear appropriate protective gloves when scrubbing tough build-up.</p><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="background:#E1F5EE; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">For tough stains</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Leave the tab longer or overnight.</p></div><div style="background:#E1F5EE; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">Add extra muscle</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Use a <a href="https://uk.koh.com/products/diamond-sponges" target="_blank" rel="noopener noreferrer" style="color:#085041; text-decoration:none;"><strong>Diamond Sponge</strong></a> on surface soil.</p></div><div style="background:#E1F5EE; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">Stay safe</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Wear gloves when tackling heavy build-up.</p></div></div></div></div><hr><div itemprop="mainEntity" id="repeat"><h2 itemprop="name" id="how-often-should-i-use-them">How often should I use them?</h2><div itemprop="acceptedAnswer"><p itemprop="text" style="display:none;">Use Loo Cleaner Tabs weekly to keep the bowl fresh and the build-up under control. If your loo is used heavily, you can repeat the routine more often.</p><div style="display:grid; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr)); gap:10px; margin:1rem 0;"><div style="background:#F5FBF7; border:1px solid #A3D6B1; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">Routine clean</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Once a week is the standard cadence.</p></div><div style="background:#F5FBF7; border:1px solid #A3D6B1; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">Busy loo</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Repeat more often if the toilet sees heavy use.</p></div><div style="background:#F5FBF7; border:1px solid #A3D6B1; border-radius:12px; padding:1.25rem;"><p style="font-size:14px; font-weight:600; color:#085041; margin:0 0 8px;">Tip</p><p style="font-size:13px; color:#0F6E56; margin:0; line-height:1.6;">Pair with a quick Loo Blade scrub for the cleanest finish.</p></div></div></div></div><hr><p style="text-align:center; margin:1.25rem 0 0;"><a href="https://go.koh.com/hc-lc" 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 articles</a></p><p style="font-size:11px; color:#0F6E56; text-align:center; margin:1rem 0 0;">Last reviewed: July 2026 &#xB7; Koh UK</p><p style="display:none;">loo cleaner tabs koh uk, how to use loo cleaner tabs, koh loo tabs, loo cleaner tablet, loo cleaner tab instructions, toilet cleaning tabs uk, koh toilet tabs, loo blade charcoal, diamond sponge toilet, how long to leave loo tabs, loo tabs cistern tank, loo tabs bowl, uk loo cleaner tabs, toilet bowl cleaner tab, koh uk toilet cleaner tab</p></article>

How to use Loo Cleaner Tabs

No scent? No stress. Loo Cleaner Tabs are fragrance-free, but you can DIY the aroma with a few drops of essential oil.

<p>No. <a href="https://koh.com/products/loo-cleaner-tablets" rel="noopener noreferrer" target="_blank">Loo Cleaner Tabs</a> do not have a fragrance. For customers who prefer an added scent, we recommend to add a couple of drops of your favourite essential oil into the bowl along with the Loo Tab.</p>

Do Loo Cleaner Tabs have a fragrance?

No. Drop Loo Cleaner Tabs in the bowl or cistern wrapper and all. The PVOH film dissolves in water and protects your skin from the concentrate →

<p>No. The PVA wrapper on <a href="https://uk.koh.com/products/loo-cleaner-tablets" rel="noopener noreferrer" target="_blank"><strong>Loo Cleaner Tabs</strong></a> is designed for your protection and dissolves readily in water. It is also biodegradable</p>

Should I remove the wrapper on the Loo Cleaner Tab?

Meet the dream team: fizzing soda, power enzymes & oxygen bleach unite for a spotless loo! 🚽✨

<table style="width:100%; border-collapse:collapse;"><thead><tr><th style="text-align:left; padding:8px; font-size:16px; border-bottom:2px solid #ddd;">Ingredient</th><th style="text-align:left; padding:8px; font-size:16px; border-bottom:2px solid #ddd;">What it does</th></tr></thead><tbody><tr><td style="padding:8px; font-size:16px;"><strong>Sodium Bicarbonate</strong></td><td style="padding:8px; font-size:16px;">Gentle abrasive &amp; deodorizer; fizzes with citric acid to loosen stains &amp; dissolve limescale.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Citric Acid</strong></td><td style="padding:8px; font-size:16px;">Descaler &amp; stain remover; reacts to fizz, dissolves mineral deposits &amp; adjusts pH for optimal cleaning.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Itaconic Acid Copolymer</strong></td><td style="padding:8px; font-size:16px;">Dispersant &amp; water softener; prevents soil redeposition and helps actives cling for longer contact.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Sodium Lauryl Sulfate</strong></td><td style="padding:8px; font-size:16px;">Surfactant; lowers water tension to break down grease, disperse soils &amp; boost overall cleaning.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Sodium Percarbonate</strong></td><td style="padding:8px; font-size:16px;">Oxygen bleach; releases hydrogen peroxide to whiten stains, deodorize &amp; disinfect.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Protease &amp; Amylase</strong></td><td style="padding:8px; font-size:16px;">Protease + amylase enzymes; dissolve protein &amp; starch stains for deeper, targeted cleaning.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Lipase</strong></td><td style="padding:8px; font-size:16px;">Lipase enzyme; breaks down fats &amp; oily residues for a grease-free bowl.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Magnesium Stearate</strong></td><td style="padding:8px; font-size:16px;">Lubricant &amp; stabilizer; keeps tablet intact during storage and controls dissolution rate.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Polyvinylpolypyrrolidone<br></strong></td><td style="padding:8px; font-size:16px;">Binder &amp; solubility enhancer; holds ingredients together and ensures even tablet breakup.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Croscarmellose Sodium</strong></td><td style="padding:8px; font-size:16px;">Disintegrant; swells on contact with water to break tablet apart for rapid ingredient release.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Microcrystalline Cellulose</strong></td><td style="padding:8px; font-size:16px;">Filler &amp; binder; gives tablet structure and regulates how quickly it dissolves.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>DL-Tartaric Acid</strong></td><td style="padding:8px; font-size:16px;">pH adjuster &amp; descaler; lowers pH to dissolve limescale and enhance other ingredients.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Sodium Carbonate</strong></td><td style="padding:8px; font-size:16px;">Water softener &amp; alkaline booster; neutralizes acids and improves surfactant performance.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>Polyethylene Glycol 4000<br></strong></td><td style="padding:8px; font-size:16px;">Binder &amp; release controller; maintains tablet shape and enables gradual, consistent dissolution.</td></tr><tr><td style="padding:8px; font-size:16px;"><strong>PVA (Polyvinyl Alcohol)</strong></td><td style="padding:8px; font-size:16px;">Water-soluble binder; keeps the tablet intact and then dissolves cleanly to release all actives.</td></tr></tbody></table><p><br><strong>SDS:</strong> <a href="https://cdn.shopify.com/s/files/1/1074/1454/files/Koh_Loo_Tabs_SDS.pdf?v=1738815749" target="_blank" rel="noopener noreferrer">&#xA0;Download the Loo Tabs Safety Data Sheet (SDS)</a></p>

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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Dishwashing Tablets

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Dishwashing Liquid

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Sensitive Laundry Liquid

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