Algae occurs naturally in healthy aquarium water.Small quantities are a good sign and can be controlled with regular maintenance. Excessive algae growth is a sign of poor water quality usually caused by overfeeding.
Algae grow more quickly in strong daylight.
The Reef One NO ALGAE cartridge and sachets will cause green water algae to die, clump together and collect in the filter cartridge.it will also precipitate the excessive nutrients that cause algae and collect them in the filter cartridge. The cartridge continues to absorb nutrients during the period of treatment.
