I am in the process of planning out a 50 gallon tank I'm going to build out of plexiglass.What I have been looking for is a submersible water pump that pumps 200gph and (heres where I have been having trouble) is inline... Everything I have been finding on E-bay and while scouring google is for fountains or powerheads..and that wont work,and if I actually find anything inline its up in the 800gph range which is way too much flow..