I have a tall 45 gallon planted tank. Light is good (3.1wpg), CO2 good(23), PH good (6.6)and hardnes good(3phm), nitrates (0.3 mg/l) and the tank isn't new. But I still can't stop brown algea from atacking my cabombas and back glass in a matter of just two days. None of my friends that have planted tanks can tell me what's wrong. I've tried everything. If their is anybody out there that can help please do. "Help me Obi-one-canoby your my only hope"