I see so many recommendations for a sump, but there is no room under so I'm planning to do side-by-side refugium.
The plan would be to use a 20g high (same 16" height as a 40g) and raising it up 4", then adding a bulkhead to the top of 20g with a return into the 40g. With the water pumping from the 40 into the 20, the water level in the 20 should stay the same (only the level of the 40 would change) making it a good place to eventually add a skimmer. It also adds an additional 50% more water volume and would be used for growing chaeto.
Anyone see any issues with that setup?
Also, thinking more about potential stocking: 2x ocellaris clown, 1x orchid dottyback, maybe a pistol shrimp/goby combo and/or a sailifin blenny...
Thanks!