I use a old whisper HOB
filter as a refugium for my 10 gal
nano. The idea is a good one just as long as it is big enough in relation to the tank. The Aquaclear models have a wide body on them so if they had one big enough, that would work. I guess a small one woul work ok for a pod haven.
*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,