So is your refuge under the tank and the other 2 tubs behind the wall are your sump?
I am doing a similar set up with a closet in my basement. I will be moving my tank downstairs and I will have everything behind the wall except for the tank.
Any other DIY
setups out there? I have an additional 15 gal
of water capacity in my sump. Not really sure I want a huge tub for a sump but I had really planned on doing water changes via the sump. If I put the refugium in the sump, that won't be able to happen. Maybe I need to find a way to have them separate using different containers.