I currently run a pair of Gen-X 40's on my 350g Cichla tank, but have heard awesome reviews about Reeflo pumps being much more quiet. That being said im about to throw down on one (or two). My question really is which one to buy? These Gen-x are rated at 1190gph each and are not very quiet at all. Im thinking I could run a single Reeflo and split it to the two returns. I could get 2 reeflos but I think I would rather run 1 just to keep it as quiet as possible. My thinking is that I could go with the 2500gph Reeflo split, and have about the same turnover rate that I have now. Or, if im going to split the return should I go with the next step up? The next step is like 3600gph which would increase my turnover rate but I also dont want to return so much water that my standpipes could not keep up. Any comments, suggestions, or experience would be greatly appreciated!