PROTOZIN is used for the control of all protozoan and fungal infections e.g Whitespot, Fungus, Neon Tetra Disease, Velvet, Costiasis and Trichodiniasis. You will require 4 separate applications to complete the course of treatment. By adding the treatment on days 1, 2 and 3 the product safely compounds in strength and does not burden the already stressed animals with a hard hitting formula. The final dose on day 6 is a preventative measure to try and ensure the organism does not re-occur. PROTOZIN\'s properties are highly effective at treating all its target organisms. Protozin is our best selling disease treatment world wide. Do not use with Mormyrids, rays, crustaceans, molluscs or related species. Do not use within 4 days of using Myxazin. Suitable for tropical freshwater and coldwater aquaria. Available sizes: 100ml (4 day course for 250 litres) 250ml (4 day course for 625 litres) 500ml (4 day course for 3750 litres) 1 litre (4 day course for 7500 litres)