Rid Fungus is a natural herbal fomula safe for sensitive fishes. It is especially helpful with sensitive fishes and invertebrates that cannot tolerate stronger chemical based treatments. It's broad spectrum of activity and lack of toxicity makes Rid Fungus effective for all types of external and epidermal singel-celled infections without requiring a specific diagnosis. Rid Fungus is safe for use with most aquatic invertebrates (such as farmed mussels, clams, oysters, shrimp.) Suitable for Freshwater. Safe for aquaponics and hydroponics.