ReeFlowers RemAlgae prevents undesired moss and helps to prevent algae growth in freshwater aquariums planted aquariums saltwater aquariums and ponds. The solution does not contain copper or heavy metals. It is highly effective on almost every algae type including green and brown algae. It is recommended that 2.5ml of ReeFlowers Rem Algae is added for every 100 liters of water every 3 days until the problem is eradicated. The solution should be administered in an area of flowing water ensuring the filters are kept on. Do not exceed the recommended dose.