Ok, from what you've said, maybe I'll take out the bio rings tonight. I use the same exact water in my other tank, and no problems there. The LR actually came from my other tank, and there was no algae on it when I put it in there. And, I'm totally with you on the bioload. Can't fix that today, unfortunatly.... Lights... probably not, I agree. So that leaves the canister filter, and the bio rings. I'll get the rest of them out of there, and see what happens. Thanks!