I'm not sure what it's rated for....but all the guys with JBJ 24ga nano tanks use this particular skimmer because it fits with the lid closed (and a modified cup).
I was under the impression skimmers keep water crystal clean....but apparently not in this case.
I'm off to buy some chemipure elite.....but that really doesn't solve the problem. I know to lower my feedings to once a day.....and I forgot to tell you guys this, but every morning I give the entire tank a "squirt" of phytoplankton. It's my intention to feed whatever corals, frags, maxima clams (3" long) and whatever else some phytoplankton....and it was my hope that the skimmer would pull out the stuff that's not eaten.