Well, while all you guys are here, I might as well ask this too. What do you do to keep your multi tanks clean? I have a pretty bad algae problem in mine, and I have no idea how to stop it. I don't leave the light on for more than 8 hrs a day, and I feed very little. I tried to put a couple otos in there to help out, but they killed one, so I took the rest out. I'm running out of ideas