[rvitko]

It looks pretty good, I would angle it a little more toward the diagonal corner, ideally you would hit the front glass about 2.75 to 3ft away from the pump. I generally would wan two pumps, the reason being it gives some redundancy and it is best to be able to alternate the flow direction, otherwise things will pile up in the far corner and corals may start to grow leaning one way. Yes, 50% would be roughly 1700 gph, technically the percent refers to the amount of power the pump is getting and it is a somewhat non linear relationship, but close enough, lets say you are between 1500-2000.