Cloverleaf Formalin Water Answer provides an effective treatment for White Spot, Costia, Childonella and Trichodina. For best results against parasites use in conjunction with Cloverleaf Malachite Water Answer The trusted Cloverleaf Water Answer concentrated range has been specially developed with ornamental koi ponds in mind. This professional pond treatment range offers a double strength formula providing a reliable treatment that is economical, space saving and environmentally conscious. Cloverleaf Formalin Water Answer Dose Rate:Add 10ml per 726L - 160 gallons 250ml Treats: 18,150L - 4,000 gallons500ml Treats: 36,300L - 8,000 gallons How Do I Use Cloverleaf Formalin Water Answer?First start by calculating the water volume, shake the bottle well before administering. Fill the measuring cup with the correct amount, stir into a bucket of pond water and distribute evenly. Dose on days 1 and 3, repeat after 7 days if necessary. (Maximum of 4 consecutive courses). Turn off UV for 5 days during the dosing period. Do not use other medications for 10 days after the last added dose. Note: Always fully read instructions prior to treatment.