[e_baer]

For algae to grow it needs nutrients in the water. It cant grow with only sunlight. If you use RO/DI water for you water changes and a good skimmer, you should not have any algae. With the combination of those 2 things, that will eliminate most, and I say most because there will always be a little, of the excess nutrients. You also need to make sure you dotn overfeed, you do your weekly or biweekly water changes etc.