Looks great Ron! I know who to turn to when I get lost building my system. ;D
I'd like to use your system to drain the tanks, but for filling I'm just going to rely on a hose and a pump. It's a little more work that way, but I don't want things to get too complicated. I'll have enough going on anyways!
P.S. I love the idea of an escape hatch in the fishroom! ;D