I started a 30G Oceanic cube last Saturday. I am using CPR Overflow, Plastic sump, Mag 7 as a return pump into a SCWD, Lighting DIY (3) 36W PC.
I am using a MTC 22" CC skimmer. It is a hang on unit but I located it in the sump. It is powered by an Aquaclear 301 powerhead, and the air pump is a...