I dont know if it is my the pump or what, but I finally got some stuff in my tank up and running today. I have a mag 7 powering my mr-2 skimmer and a coral-life turbo sea 1700 for my main pump (powers the overflow returns and will power a calc/phos reactor) and let me say holy crap is something in there loud. For my CLS I have a dart pump for 3600 or so gph and it purs. I have my sump sitting on a word floor, I think that might be giving off a lot of vibrations because even with the pump suspended in the air i hear a lot of noise. I know most people are going to say use flex pvc instead of rigid, but the tank is plumbed and no pipe is hitting wood. Should I put a rubber matt on the floor? If so where could I get one? I think Im going to ditch the coral life pump and either go with insump mag drive or I a dart or some other pump. Any advice?