Waterlife Protozin is an effective medicine for tropical fish in the treatment of protozoa and fungi such as. Whitespot (white spots), Velvet (small gray spots), Costiasis, Fungus (cotton) disease of Neon Tetra, Trichodiniasis. Suitable for tropical and cold water aquariums Safe for plants. 100ml – 4 days treatment in 250 liters of water