Hey Jeremy, I am in the process of trying to replace my current large foot print skimmer. I have a 180 with a 40 gallon sump. I would say on the heavy stocked side, if not now will be soon! I was eye balling the Super Reef 3000SSS. Reading up on it says that its rated up to 300 gallons is this correct or would be my other readings around 200 would correct? I would like something a little smaller just make make room in my sump. Thanks for your time!!!