" Targeted treatment attacks only those pathogens that pose a threat while leaving helpful strains untouched, bombards infections with multiple antifungal agents. 100% safe for use on all species of fresh and saltwater fish. Wont harm invertibrates, live plants or the biological filter. Colorless formula won't discolor aquarium water or stain ornaments. " 4 oz .bottle (118 ml) Treats 236 U.S. gallons
