Recently, I purchase a 75 gallon with a 30 gallon sump. It has an overflow box and is drilled with 2 returns and a spray bar return. It came with bunch of piping but can't seem to figure out how it all went together. I'm new to the overflow and closed loop thing. Does anyone know where I can find some good pics of other closed loops with a system similar to mine or a "how to" with pics?