Okay, I have a 75 gallon cornerflow with a marineland model 2 sump, which has a dedicated chamber for an in-sump skimmer...however, I've only had the whole set-up going for two months and knowing that I wouldn't need a skimmer right away, I decided to turn the skimmer chamber into a refugium. I'd like to keep it that way, but now I don't know what to get for a skimmer - any recommendations for an HOS (hang-on-sump) skimmer? 
