{"product_id":"pond-sludge-remover-pellets-uk-150-pellets-koi-safe-clears-pond-floor-natural-bacteria","title":"Pond Sludge Remover Pellets UK | 150 Pellets | Koi Safe | Clears Pond Floor | Natural Bacteria","description":"\u003cp\u003e\u003cstrong\u003ePond sludge remover pellets are slow-dissolving bacteria pellets that sink directly to your pond floor to digest organic sludge, muck, and decomposing matter at the source. Each pack treats ponds up to 25,000 gallons naturally and safely, with no risk to koi, goldfish, or pond plants.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2\u003eThe Hidden Threat Beneath Your Pond\u003c\/h2\u003e\n\u003cp\u003eEvery garden pond accumulates a layer of organic sludge on its floor — a mixture of fish waste, uneaten food, leaf fragments, dead algae, and mud. Over time, this layer thickens, consuming oxygen and releasing hydrogen sulphide (the rotten egg smell), ammonia, and phosphates that trigger algae blooms and stress your fish. Standard water treatments address symptoms — our pellets attack the root cause.\u003c\/p\u003e\n\n\u003ch3\u003eSlow-Release Bacteria Pellets: Targeted Deep Action\u003c\/h3\u003e\n\u003cp\u003eUnlike liquid bacteria products that disperse throughout the water column, our heavy pellets sink directly to the pond floor and dissolve slowly over several days. This delivers a concentrated dose of beneficial bacteria and enzymes exactly where sludge accumulates — on the bottom, in corners, and around plant roots. The result is dramatic reduction in sludge depth, improved water quality, and reduced algae pressure without disturbing your fish.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e150 or 300 pellets\u003c\/strong\u003e — generous treatment quantities\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eSinks to pond floor\u003c\/strong\u003e — targeted sludge action at the source\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eNatural beneficial bacteria\u003c\/strong\u003e — no harsh chemicals\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eKoi \u0026amp; fish safe\u003c\/strong\u003e — completely safe for all pond life\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eTreats up to 25,000 gallons\u003c\/strong\u003e — suitable for large ponds\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eSlow dissolving\u003c\/strong\u003e — sustained bacteria release over days\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003ePellet count\u003c\/td\u003e\n\u003ctd\u003e150 pellets \/ 300 pellets\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eTreatment capacity\u003c\/td\u003e\n\u003ctd\u003eUp to 25,000 gallons per full dose\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eActive ingredients\u003c\/td\u003e\n\u003ctd\u003eBeneficial bacteria, enzymes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eDrop directly into pond\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eDissolve time\u003c\/td\u003e\n\u003ctd\u003e3–5 days per pellet\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSafe for\u003c\/td\u003e\n\u003ctd\u003eKoi, goldfish, plants, wildlife\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePellet Dosage Guide\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003ePond Volume\u003c\/th\u003e\n\u003cth\u003eMonthly Dose\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eUp to 5,000 litres\u003c\/td\u003e\n\u003ctd\u003e5 pellets\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e5,000–10,000 litres\u003c\/td\u003e\n\u003ctd\u003e10 pellets\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e10,000–25,000 litres\u003c\/td\u003e\n\u003ctd\u003e20–25 pellets\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eLarge koi ponds 25,000L+\u003c\/td\u003e\n\u003ctd\u003e30+ pellets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eHow long before I see sludge reduction?\u003c\/h3\u003e\n\u003cp\u003eAfter the first treatment you'll notice reduced odour within a week. Visible sludge reduction typically takes 2–4 weeks of monthly treatment. Heavily silted ponds built up over years may take a full season to show dramatic improvement.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use sludge pellets with a running filter?\u003c\/h3\u003e\n\u003cp\u003eYes — in fact a running filter enhances results by maintaining oxygen levels that help bacteria thrive. Never turn off your filter during treatment.\u003c\/p\u003e\n\n\u003ch3\u003eAre these pellets safe if my koi eat them?\u003c\/h3\u003e\n\u003cp\u003eThe pellets are not fish food and koi should not consume them, but if a fish mouths a pellet it will not cause harm — the bacteria content is non-toxic. The pellets sink quickly so fish rarely interact with them.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use these pellets in a wildlife pond?\u003c\/h3\u003e\n\u003cp\u003eAbsolutely. Our bacteria pellets are safe for all pond wildlife including frogs, newts, dragonfly larvae, and aquatic insects. They pose no risk to the wider garden ecosystem.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know how many pellets to use?\u003c\/h3\u003e\n\u003cp\u003eUse the dosage guide above based on your pond's volume in litres. If you're unsure of your pond volume, calculate: length (m) × width (m) × average depth (m) × 1,000 = litres.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e🚚 Free UK delivery | 📦 Dispatched within 1 business day | 💬 Expert pond advice available\u003c\/em\u003e\u003c\/p\u003e","brand":"PondLiners Co","offers":[{"title":"150 Pellets","offer_id":57667227156828,"sku":null,"price":243.0,"currency_code":"GBP","in_stock":true},{"title":"300 Pellets","offer_id":57667227189596,"sku":null,"price":419.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/eaf6c80dfd0d6378485d7582a0c38f42.jpg?v=1779042839","url":"https:\/\/www.pondlinersco.co.uk\/products\/pond-sludge-remover-pellets-uk-150-pellets-koi-safe-clears-pond-floor-natural-bacteria","provider":"PondLinersco.co.uk","version":"1.0","type":"link"}