API Pond 16 OZ Melafix, Pond Fish Bacterial Infection Remedy, Heals Bacterial Infections & Repairs Damaged Fins, Ulcers & Open Wounds Contains Natural, Botanical Tea Tree Extract To Quickly & Rapidly Help Fish Helps Treat Newly-Introduced Fish To Reduce Risk Of Disease Outbreak In Freshwater Ponds Use Daily For A Week When Treating Infections & For Three Days As A Preventative When Adding New Fish, Bottle.