Cloverleaf’s Bacterial Answer (Double Strength) is a highly effective, professional-grade pond treatment designed to combat harmful external bacterial infections in koi and ornamental pond fish. With its 2x concentrated formula, it offers twice the power in half the dose — making it a cost-effective, fast-acting solution for common pond health issues.
This treatment targets external bacterial conditions such as ulcers, fin rot, mouth rot, red sores, and inflamed wounds, helping fish to recover naturally while promoting clean, healthy pond water. It's especially useful after periods of stress, spawning, or parasite-related damage when fish are most vulnerable to secondary infections.
Double-strength concentrate — economical and powerful
Treats external bacterial infections like ulcers, fin/mouth rot, and red sores
Safe for koi and most ornamental species when used as directed
Will not affect biological filtration, pond plants, or water clarity
Excellent follow-up treatment after parasite control or injury recovery
Manufactured in the UK to high aquatic health standards
Use 10ml per 227 litres (50 gallons) of pond water
Dose once per week for up to 3 treatments
Remove carbon/zeolite before use; ensure good aeration
Do not mix with other treatments unless advised
250ml bottle treats up to 11,350 litres (2,500 gallons)
500ml bottle treats up to 22,700 litres (5,000 gallons)
⚠️ Not suitable for sensitive species such as tench, sturgeon, or orfe. Avoid use in low temperatures (below 12°C). Wear gloves and avoid contact with skin or clothing.
For complete treatment coverage, we recommend pairing Cloverleaf Bacterial Answer with Malachite Answer. Malachite is especially effective against fungal infections and certain parasites, which often accompany or precede bacterial infections in ponds. Using them in sequence (not at the same time) provides comprehensive protection against mixed infection outbreaks — ideal for improving overall fish health and recovery.
