Blagdon Koi Anti Parasite uses a number of active ingredients to create an effective and safe treatment that acts against White Spot, Slime disease protozoan parasites (Costia sp., Trichodina sp., Chilodonella sp.), Flukes (Dactylogyrus sp. and Gyrodactylus sp.) and also Velvet parasites (Oodinium sp.) This is a five day course of treatment that builds an effective dose in the pond whilst minimizing stress on the fish. The five-day course also ensures that effective levels of active ingredients are present over a period to catch parasites in the susceptible phase of their life cycle. The treatment can be used on all pond fish but is specially formulated for Koi Carp. How much do I need? 250ml Treats 2,273 Litres (500 Gallons) for 5 Days 1000ml Treats 9,092 Litres (2,000 Gallons) for 5 Days Use to treat parasite disease on Koi such as White Spot, Slime disease and Flukes The treatment is now in an easy does bottle 25ml treats 1,136 Litres (250 Gallons)