Plumbing

I've been planning my SPS Aquaculture Rack System for several months now. I have all of the equipment now and I'm beginning to put pieces together. Here's the list.

Tanks - All tanks have drilled returns and are placed on metal rack systems.
8' tall rack system with three 48"x12"x12" 33g tanks.
5' tall rack system with two 48" long x 20" wide x 16" tall 56g tanks (the bottom tank will be used as the sump)

Lighting - Each 33g tank ...