You will be amazed at how much current teh tank can handle. I run about a total of 3,800 gph through my 75g. I know folks running even more. One fella I run around with has 3 Seio 2,600 in his 70g cube. The thing is the flow needs to be non directional. Aim it at the glass or the surface. You don't want to just aim it 24/7 on a particular coral.