Pump will depend on the gph
of you overflow. Get one that that flows the max at the head height you have.
Fuges are great. I have a fuge that is a 25 gal
rubbermaid sitting in a 75 gal
rubbermaid stock tank. I have about 50 lbs of LR
in the rest of the sump. Refugiums are great nutrient exporters.
*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,