Hi. After rescaping my tank, got some algae outbreak. Seems like Staghorn Algae and/or Black brush. As I understand that kind of algae prefers "dirty" water. What is interesting that the problematic area (basically isolated in that area) is under HOB filter output. Theoretically place in tank, that should be the cleanest and with biggest flow. Question: can I make conclusion that my filter output is not filtered as it suppose to be filtered? Filter flow is more than enough. Filter max nominal flow ~210 gallons/h in 10 gallons tank. Filter media sponge-> peat -> ceramic rings -> top live plants. Theoretically maybe I messed up by adding filter media, because I had to cut original sponge, to add other media.