Melevsreef.com - What is a Sump?
This is the link. At the bottom of the page, there are links to a 3 part article on a fish magazine that gives even more details.
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.