Alg Exit from Easy-Life will rid your freshwater aquarium or pond of algae such as beard algae brush algae & string or thread algae. It is harmless to fish crustaceans & plants. Alg Exit is very easy to use & you will rapidly see results – just add 10ml per 100 litres of water weekly over a period of four weeks. This can be extended if there is still algae present or if spores continue to germinate. You can also use Alg Exit as a preventative treatment. Add 5ml per 100 litres of water twice a week. Use in this way makes Easy-Life Alg Exit very effective. Dosage Add 10ml per 100 Liter of water each week over a period of four weeks To prevent further infestation add 5ml per 100 litres of water twice a week Instructions for use Shake before use Treatment can be extended easily if there are still algae or spores present Remove active carbon before using Alg Exit Only for use in freshwater aquariums Warning Use biocides with care. Active ingredient salicylate. Do not add too much. Keep out of the reach of children & pets.