I've been convinced to go get my glass 45G tank drilled rather than dealing with an over-the-back suction drainage. I've read that two drains are better than one...so, is it easy enough to get two holes drilled and connected to one sump? How big do the holes need to be for a 45G tank (sump is 25G)? Piping, hose, etc I know you can get at the hardware store - what about the bulkheads? Admittedly, I'm not even sure exactly what comprises the 'bulkheads' but I know they're obviously needed Definitely going to be a learning experience for me...