There is a sump write up in the articles section. Also read up as much as you can on overflows and return pumps. These will be necessary items to operate a sump.
Let us know more specifics when you are ready.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,