I just ordered a 265gph pump, the return is a3 foot 1/2" straight pipe that splits into 2 loc-line 12" 1/2" with flare nossels. This should result in around 200gph... hopefully! For drainage I'm going with a 1.5" with a 9" screen off an elbow. For lighting I went with a 24"x4 24w tek lighting so...