Colombo Lernex Pro is an improved version of Colombo Lernex and is an effective koi parasite treatment against resistant Gill Flukes, Skin Flukes and internal worms. This koi treatment is based on the latest scientific knowledge and contains high-quality anti-worm agents, such as Nitroscanate and Flubendazole, to which resistance has not yet been built up. 1,000ml treats 20,000 litres or 4,400 gallons

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