1 litre of Formaldehyde with the highest concentration of gas dissolved in liquid Ideal for use against parasitic infections For use If you have problems with the following protozoan parasites White spot Tricodina Chilodonella Cost Directions Add 10ml to approximately 680 litres of pond water Mix the 10ml in a large bucket of water prior to final dilution Repeat with second application after 7 days if required A Maximum of 3 applications can be added Switch off UV for 5 days after each application These treatments are recommended for Koi Carp and Goldfish Do NOT exceed the suggested dose and we don't accept any liability for incorrect use