This is an ideal product for beginning aquarists, and may be used weekly to ensure a safe aquatic environment for goldfish.This is an ideal product for beginning aquarists, and may be used weekly to ensure a safe aquatic environment for goldfish. API GOLDFISH CARE PACK makes goldfish care quick and easy by combining the superior water conditioning of GOLDFISH PROTECT removes harmful chemicals from tap water, and the cleaning power of API GOLDFISH AQUARIUM CLEANER, which works to naturally break down fish waste and keep gravel clean by removing organic sludge.