Well this is my set up
http://www.youtube.com/watch?v=gj7hwCoMcN0&list=UU-8Bs7Mzf5mRbySlhOY_ihw&index=1&feature=plcp
55 gallon tank
GLO 48 inch doubleT5 light
I drilled the back for a 3/4 pvc pipe with elbows as overflow
on the back I put a T pvc to let air in this stoped the draining...