Kusuri Fluke M is a 50mg/g Flubendazole medication used to eradicate Gill and Body Flukes. This treatment is safe to use without destroying your filter bacteria. It can be used at any temperature. While dosing with Fluke M you can continue to feed. If the mucus layer is excessive, we advise dosing with Chloramine T at 15g per 1000 gallons, 24 hours before using Fluke M, 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%. Fluke M is safe to use with salt. 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 P or Kusuri Fluke S after 7 days.