API POND MELAFIX Pond Fish Bacterial Infection Remedy uses the antibacterial properties of tea tree (Melaleuca) to treat bacterial infections in pond fish, including ulcers, open wounds, and fin and tail rot. Healing and tissue re-growth can often be seen within four days of treatment. API POND MELAFIX Pond Fish Bacterial Infection Remedy will not harm the biological filter and is safe for snails, aquatic plants and other wildlife. API POND MELAFIX is also recommended when adding new fish to a pond.