Well, it's been 6 weeks since I started my 90 gallon tank. I'm using an AC 110 HOB and a Jebo canister. I have about 15 or so Mbuna, 2 Cats, and a small Pleco in the tank and all are doing well. I'm doing weekly 50% WC's. My readings have all been good. The past few days I've noticed a lot of algae growing in the tank, mainly on the inside of the glass. In fact, I just finished scraping it off. My question is, is it time for me to clean one of the filters? I haven't touched them yet. By cleaning I mean I would rinse in tank water. When should I start vacuuming the substrate?