Well im upgrading from a 90 to a 335 i know its a big jump i have most of my equipment my tank is 5 '3'3' it has a pvc bottom with an island over flow and im wondering if i can make it so i can do a close loop dont know if i can drill it or not also i realize the tank is a bit tall so ia got 4-400w metal halides and im wondering if it will be enough lighting heres some pics also if it wouldnt be to much to ask if some of you can post pics of your pluming thanks you heres some bad pics lol still in a crate and i have the fixturtes in it sorry for the lame pics