Pond 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.
The Hidden Threat Beneath Your Pond
Every 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.
Slow-Release Bacteria Pellets: Targeted Deep Action
Unlike 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.
Key Features
- ✅ 150 or 300 pellets — generous treatment quantities
- ✅ Sinks to pond floor — targeted sludge action at the source
- ✅ Natural beneficial bacteria — no harsh chemicals
- ✅ Koi & fish safe — completely safe for all pond life
- ✅ Treats up to 25,000 gallons — suitable for large ponds
- ✅ Slow dissolving — sustained bacteria release over days
Product Specifications
| Feature |
Detail |
| Pellet count |
150 pellets / 300 pellets |
| Treatment capacity |
Up to 25,000 gallons per full dose |
| Active ingredients |
Beneficial bacteria, enzymes |
| Application |
Drop directly into pond |
| Dissolve time |
3–5 days per pellet |
| Safe for |
Koi, goldfish, plants, wildlife |
Pellet Dosage Guide
| Pond Volume |
Monthly Dose |
| Up to 5,000 litres |
5 pellets |
| 5,000–10,000 litres |
10 pellets |
| 10,000–25,000 litres |
20–25 pellets |
| Large koi ponds 25,000L+ |
30+ pellets |
Frequently Asked Questions
How long before I see sludge reduction?
After 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.
Can I use sludge pellets with a running filter?
Yes — in fact a running filter enhances results by maintaining oxygen levels that help bacteria thrive. Never turn off your filter during treatment.
Are these pellets safe if my koi eat them?
The 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.
Can I use these pellets in a wildlife pond?
Absolutely. 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.
How do I know how many pellets to use?
Use 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.
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