Rid your fish of fungal infections quickly and effectively with API LIQUID FUNGUS CURE Freshwater Fish Medication. API LIQUID FUNGUS CURE Freshwater Fish Medication works quickly to control contagious fungal infections and helps prevent the growth of fungus on fish eggs prior to hatching. It effectively treats fungus (Saprolegnia spp. & Achlya spp.), mouth fungus (Cotton Mouth Disease), and Fin & Tail Rot infections. Use at the first sign of fungal infections. Corals and invertebrates may be sensitive to this medication. This product is not recommended for use with invertebrates and plants as some species may be sensitive to medication. This medication will cause a slight discoloration of water which can be easily removed by adding activated carbon to the filter.