Kusuri 30% Formalin and Malachite Premix is a ready to use full strength formulation, popular as a pond-wide anti-parasite treatment. It is particularly good for White Spot, Skin Flukes, Chilodonella, Oodinium and most Protozoan Parasites. Do not use below 12.5°C (54.5°F). 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. Dosage: 100ml per 1000 gallons (4546 Litres) of pond water. Directions: Treat up to 3 times 5-7 days apart maximum. Do not use below 12.5°C (54.5°F). Slowly apply to the pond over a 1 hour period, this will prevent shocking the pond with a highly concentrated dose. Do not use Malachite and Formalin Premix in conjunction with salt. Stop feeding during the course of treatment because Malachite and Formalin will reduce the bacteria in the filter, continuing to feed will cause an ammonia spike. Once the course of treatment is complete monitor your water parameters regularly and add good bacteria to restart your filters, such as Kusuri Filter Starter Boost or Kusuri Starter Pink.