API GOLDFISH PROTECT makes tap water safe for goldfish, protecting them from harmful ammonia and removing chlorine and chloramines from tap water. GOLDFISH PROTECT benefits the protective slime coat of Goldfish. Use when starting a Goldfish aquarium or bowl, when changing or adding water, or when water testing shows the presence of ammonia. Dose according to directions on product label. Product contains 4 fl oz of solution, and treats up to 47 US gallons of aquarium water. With API aquarium products, its easy to keep a beautiful saltwater, freshwater or reef aquarium. For over 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because were dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.