API FIN & BODY CURE Freshwater Fish Powder Medication treats bacterial disease, internal and external, in fish, including fin & tail rot, bacterial gill disease, hemorrhagic septicemia, open red sores, and body slime and eye cloud. Each box contains ten packets of this freshwater fish treatment. This medication will cause a slight discoloration of water which can be easily removed by adding activated carbon to the filter. For best results, dose according to the directions on the product label. API FIN & BODY CURE Freshwater Fish Treatment should only be used in freshwater aquariums.