Goldfish can sometimes become unwell, and most diseases are easy to cure if they are treated early enough. As soon as your goldfish behaves unusually or appears sick Disease Safe should be used to help. If your goldfish has ragged or blood streaked fins, unusual swimming action or loss of balance, cotton wool-like growths, slimy white skin or fins, cloudy eyes or white spots. Also, if they lie still on the bottom, show loss of appetite or are gasping at the surface, then Gold Disease Safe can help. Pack contains approximately enough for 10-12 doses.