how to control algae in my aquarium?
To help control algae, follow these simple steps: 1  Scrub the sides of the tank as needed to remove algae, scrub immediately before water changes, so that free floating algae can be removed with the dirty water.2  Additional free floating algae will be removed by your mechanical filtration. This can remove free floating algae, but will also remove phosphates and Nitrates that contribute to algae growth. 2  Make sure that the tank receives no direct sunlight. 3  Direct sunlight, even for a short time or only on part of the tank will encourage algae growth, especially where the light hits the tank.