I know (at least I think I know) that I have enough flow in my 90 BB setup. I have 2 maxi mod's 1200's, 1 seio 1100, 1 rio pump and one unknown name. I also have a mag 9 for a return which enters the tank with a split flow (it is cut back a great deal bc 900gph is too much on the return), You can see the maxi's and seio in the pic. The other two sit atop the starboard and basically keep the bottom clean. I just started adding SPS frags. For the most part, they seem to be doing well, but I just don't see their polyps 'swaying' as they did from the mother colonies where I got the frags. Are these powerheads not positioned in the most ideal position? I don't even have room if I wanted more flow and I already think they are obstrusive looking enough. Any suggestions?