Antigreen 100 ml, Aqualine Buschke. Antigreen will control blue-green and filamentous green algae in freshwater aquaria. No toxic residues are left in the water after its decomposition. When used in accordance with the instructions, plants and fish will not be harmed, and higher plant growth will even be stimulated. During treatment, the filter may remain in operation, and the microfauna will remain intact. 100 ml for 40 gallons.