CrystalClear, 8 OZ, Paracid, Used To Control Infestations Of Fish Lice, Anchorworm & Flukes Which Are Common In Pond & Aquarium Habitats, Works Extremely Well On Pond Fish Species Such As Koi & Goldfish As Well As On Commonly Found Aquarium Fish Species, Quick & Safe Formula, Safe For All Fish & Plants, 8 OZ Bottle Treats 9,600 Gallons.