Yeah, I really just rely on the return pump to keep water moving through the filtration. I have 2-790gph wavemakers that keep the display movingIt does help some but since it’s only been a day, I’m letting it go for another day or two before I really judge anything. I am also going to upgrade the pump to the Sicce 1.5 today to see if more flow helps in this endeavor. I think the stock pump is just weak. I upgraded the pump on my Evo almost immediately & got great results there. Not sure why I would think this tank would be any different but I also don’t have any corals the require a lot of flow in the flex.