I've started on another new project involving microbially-mediated precipitation of CaCO3 and rock formation, but this one is going to be freshwater.
This is going to be another view-from-above aquascape in a shallow tank and I have my eye on these two enclosures...
UNS 60S - 10 Gallon Ultra Clear Rimless Aquarium
UNS 45S - 5 Gallon Ultra Clear Rimless Aquarium
I'm building a 10-series 80/20 aluminum stand for this like the shelf setup I have with my wave machine tank...
The 60S tank is 23.62" X 14.17" X 7.09". I should be able brace up the 10-series (1" X 1") aluminum to make it strong enough for 10 gallons of water with other stuff, but I think it will look spindly in those dimensions, so I'm leaning more toward the 45S (17.71" X 11.02" X 7.09"). It would also be a good idea to make a couple of CAD models to compare. Maybe I'll do that in the middle of the night at some point.
In contrast with 2-part calcium & alkalinity dosing for the stromatolite tank (above), this new project will use a calcium reactor with CO2. I like the idea of visible hardware so the stand will be open underneath with a view of the reactor and cylinder. I wondered about a canister filter also, but I'm disinclined to run a new canister with water near calcium saturation, so I'll probably just try to hide an economy internal filter instead.
I put them together and the reactor + CO2 cylinder with regulator fit OK in the smaller 17" X 11" footprint I would have under the smaller tank. The only other things I would need to accommodate under there would be a dosing pump and maybe a pH monitor if I decide to use a probe..