PimaFix is a natural botanical anti-fungal remedy for both fresh and saltwater aquariums. It will not discolour water or stain decorations. Can be used together with Melafix to relieve a broader range of infections and promote faster healing. Relieves fungal infections and both internal and external bacterial infections. Will not adversely affect the biological filter, alter the pH, or discolor water. Safe for reef aquariums and live plants. For use in fresh or salt water.