Putting the fuge on top of the sump would require a stand 28" tall. That puts the top of my tank at 52" + a couple 2x4s and a plywood base. Thats putting the bottom of my tank about 30" off the ground and the top would be close to 5' off the ground. Add a canopy and it's 6' off the ground. I'll have to think about that one.
It's a good idea, I just haven't wrapped my head around all this yet.
Another design. Every inch of water in the return section is .62g of water. 6" of water would be about 3.75g of water. 8" of water would be about 5g of water in the return section.
With this layout, I'd probably run the refugium about 14" deep. A 6--8" DSB and 6-8" of water on top. With skimmer baffles at 8", I would have about 17g of reserve in case of an overflow.
