Switch off UV steriliser until course of treatment is complete. Tighten cap and mix well. Measure out the correct dose. Fill a clean watering can with fill with pond water, then add Formalin. Gradually sprinkle across the surface area of the pond over a 1- hour period. Do not use below 12.5°C. Never use Formalin with salt in the pond, or if the liquid has gone cloudy, or has crystallised.

Stop feeding during the course of treatment because Formalin will reduce the bacteria in the filter, continuing to feed will cause an ammonia spike.

Please Note:

Kusuri Formalin and Malachite green is now available as a Premix solution

Switch off UV steriliser until course of treatment is complete. Tighten cap and mix well. Measure out the correct dose. Fill a clean watering can with fill with pond water, then add Formalin. Gradually sprinkle across the surface area of the pond over a 1- hour period. Do not use below 12.5°C. Never use Formalin with salt in the pond, or if the liquid has gone cloudy, or has crystallised.

Stop feeding during the course of treatment because Formalin will reduce the bacteria in the filter, continuing to feed will cause an ammonia spike.

Please Note:

Kusuri Formalin and Malachite green is now available as a Premix solution