Depends on how new your tank is, and how well you stabilize the water chemistry. If its a new tank, you can probably expect to see the growth return for awhile, until the "cycle" completes and the tank actually stabilizes. If its an established tank, you need to look for the source of nutrients and eliminate it, which will eliminate the algae growth. Coralline in a healthy tank will eventually replace most of the nusience (sp) algaes, but they can still show up when temp, light, and water chemistry is off. Hope that helps