Diy 20 gal sump/refugium

Reef Of Mars

New member
Hello, I know this question is a bit redundant (sorry)
I am new to this hobby and have been planning on starting a saltwater tank that would mainly house corals and a few fish"¦

I currently have a 40gal tank and a 20gal tank to use as a sump/refugium. Is this a good enough size? I know the baffles are spaced and placed as one desire but what stages are a most in a sump of that size?

I am planning on buying my skimmer and RO/DI system from BRS but am afraid to make the plunge due to not knowing exactly what I need.

Please Help, Thanks in advance
 
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