Kusuri Fluke S is a 50% Praziquantel based medication used to eradicate Gill Flukes, Body Flukes and Tape Worms. This treatment is safe to use without destroying the bacteria in the filter and can be used at any temperature. While dosing with Fluke S you can continue to feed. This product is designed as a one off treatment, but may require a second dose after 7 days in heavy infestation. Alternatively you can use Kusuri Fluke M after 7 days. If the mucus layer is excessive, we advise dosing with Chloramine T at 15g per 1000 gallons, 24 hours before using Fluke S, this will assist in reducing the mucus membrane where body flukes can sometimes get trapped. Caution: Please check your pH and KH prior to using. Chloramine T can be very toxic in soft water. If your pH is below pH7 (acid) and has a general hardness below 6°dH (soft water) reduce the dose by 75%. Do not use with salt. For use with all cold water ornamental fish. Please ensure that you read, understand and follow, all Health and Safety guidelines. Please do not eat, drink or smoke whilst handling chemicals. Wear disposable vinyl or latex gloves and appropriate eye protection.