So I would like to get a new skimmer. Right now I'm running a bubble-magus nac3. It is on a 57 gallon tank with a medium heavy bio load. I have a mixed reef and think this skimmer will not cut it in the near future. So my 3 options are another bubble-magus but the 3.5 or a nac7. My third option is a eshopps s-120. I don't want to under skim of course or don't want to over skim as well.

