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. Interpet Anti Parasite uses a number of active ingredients to create an effective & safe treatment that acts against: White Spot. Slime disease protozoan parasites (Costia sp., Trichodina sp., Chilodonella sp.) Flukes (Dactylogyrus sp. & Gyrodactylus sp.) Velvet parasites (Oodinium sp.) Available in 3 sizes. For more information please call us on 01789 763 336.