So I have a 150 gallon setup, I am going to drill the back (which is non tempered) but I need to know what size bulkheads and how many to run for drain and return lines. So far I would like to have 2 drains going into the sump and 1 return line with a tee fitting that feeds the fuge. I have not drilled or plumbed anything please critique as much as possible I would like to do this right the first time. I am going to add pics of the setup. Thank you. Tank is a 150G 72x28x18. And there is two 20g longs undernieth for sump and fuge.