I had problems with algea last fall and was told to add a fuge and get more flow in the tank. I had the slime algea. Well after christmas I got a pre-drilled tank and added a sump and fuge underneath in the cabinet. I also put 2 kordla 3 for more flow and added them to the bottom to blow over the rocks. With them and the mag 12, I have to be around 2800gph but I have the green hair like algea and just noticed the slime algea coming back. Anybody have any ideas. The tank is a 125. I have the bright lights on from 11:30-8pm and the actics on before and after that for about an hour and a half.