kelhuffman, my wife agrees with you and suggested leaving the niche rear drywall and studs intact. Extra width will come from relocating the external overflow and having the tank protrude from the niche into the room a bit.
An updated diagram attached is as .pdf file. New dimensions are 73L x 30W x 27H. External overflow off right side panel has 24 linear inches and bottom holes for 1-1/2" and 1" Spears Sch80 bulkheads (for 1-1/2" Durso standpipe and 1" emergency/secondary drain, respectively).
I'll probably bag one of the closed loops with a group of Vortech pumps. The other I'll keep, drain to Dart to 1/2HP Tradewinds chiller (1-1/2" ins and outs) to OM 4-way back to tank. This will help generate chaotic flow, and also maximize efficiency of the chiller by pulling water from the bottom of the tank. Another Dart will be used on the sump drain, with a ball valve manifold to distribute water to the various reactors and of course the sump returns. I'll likely use a pair of Wavyseas on the sump returns to create additional random flow.
An updated diagram attached is as .pdf file. New dimensions are 73L x 30W x 27H. External overflow off right side panel has 24 linear inches and bottom holes for 1-1/2" and 1" Spears Sch80 bulkheads (for 1-1/2" Durso standpipe and 1" emergency/secondary drain, respectively).
I'll probably bag one of the closed loops with a group of Vortech pumps. The other I'll keep, drain to Dart to 1/2HP Tradewinds chiller (1-1/2" ins and outs) to OM 4-way back to tank. This will help generate chaotic flow, and also maximize efficiency of the chiller by pulling water from the bottom of the tank. Another Dart will be used on the sump drain, with a ball valve manifold to distribute water to the various reactors and of course the sump returns. I'll likely use a pair of Wavyseas on the sump returns to create additional random flow.