first, please be easy on me. I don't know any better. I posted a couple questions already about the fish. 3 getting larger by the day feeders. I have already been told to rehome them to a pond. my wife really really really wants to keep them. If I can accommodate her without hurting the fish I will. I may eventually have to if they get too big anyway. on to the questions. I'm actively seeking a 100/125 gal tank in the local classifieds. now for filtration: would the fx5 or the SUNSUN 530gph cannister pump be too much turbulence for the tank? or should I go smaller. I really like the tanks with rocks, so can I get rocks from the local river,stream or sand and gravel pit? Not going to put anything live in the tank except the fish. saying help at this point would be an understatement...