King British Disease Clear is a veterinary medicine containing silver proteinate. This is a broad-spectrum treatment that is helpful against most bacterial & fungal infections. Particularly recommended to keep torn fins, damaged tissues or gills from becoming infected after bullying. Also good as a precautionary treatment if introducing new fish. Suitable for both coldwater & tropical aquariums. Active ingredient: Silver proteinate 0.151% w/w. One 100ml bottle will treat up to 900 litres of tank water. Available in 50ml and 100ml bottles.