Easy-Life Blue Exit effectively combats blue algae or slime algae (cyanobacteria) in freshwater aquariums. The algae combatant is non-toxic for fish, shrimp & plants. Daily use of 10ml per 80 litres over a period of 5 consecutive days removes cyanobacteria within 10 days following the first dose. The water should not be changed within the first 14 days of the first dose & no adsorption materials should be used. Instructions: Use 250ml of Blue Exit for 2000 litres of aquarium water. Remove any adsorption materials (like active coal) & shake well before use.