Persistent Murky Water in a 3000-Gallon Pond with Bog Filter

Persistent Murky Water in a 3000-Gallon Pond with Bog Filter

After treating string algae with AlgaeFix and clarifier (EcoFix), a 3000-gallon pond with a bog filter and 970 GPH pump cleared for two weeks then turned murky. Rock algae persists. Clarifier no longer works. Nine fish appear healthy.

Diagnosis

Murky water (not green) suggests either a normal level of suspended particles or an overloaded bog filter releasing organics that feed algae.

Solutions

1. Try a different clarifier – concentrated tablet forms (e.g., Pond Market Fizzy Kicks) may work better.
2. Balance the pond: Ensure pH 6.5-7.5, cover 1/2 to 2/3 of surface with plants.
3. Inspect bog filter: Remove excess sludge and debris; ensure proper flow distribution.
4. Consider a UV clarifier: Effective for green water and some suspended bacteria; install after mechanical filtration.

Rock algae is normal and beneficial; manual removal or sodium percarbonate products (GreenClean, OxyClean) can control excess.