My brother has a major algae problem in his 55g all his plants are covered in staghorn except for the fast growing rotala rotundifolia... He's too lazy to look up his problem and much less to fix it. So i was wondering What should he do? His current filtration is a AC70 with a penguin 350 and there's a hydor k2 being used for co2 dispersment. His lighting is 2x54w catalinas running for about 12hours. If i'm missing any nessecary information just let me know.