Kusuri Acriflavin & Malachite Green Premix is a ready to use full strength formulation, popular as a pond-wide anti-parasite treatment.  It is particularly good for Costia and Trichodina.  Please ensure that you read, understand and follow all Health and Safety guidelines on the bottle.  Please do not eat, drink or smoke whilst handling chemicals.  Wear disposable vinyl or latex gloves and appropriate eye protection.