It will work but you could get a bigger one if your overflow will support it. I run a mag7 on my 75 but my overflow is only rated at 650gph so that is as big as I can run. I have 3 ph
's in the tank though.
*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,