Today I got a 40gal breeder tank (36x18x16) to use as a sump. The question is what would be good sizes for each of the areas of the sump? I was thinking doing intake, return and refugium. Going to get a AquaC EV-180 Skimmer, and for the return pump a mag12. The display tank is aga 120gal 48X24X24 with 2 overflows.