I have a USED ATI Bubble Master 200 Protein Skimmer for sale. Ran a heavily stocked 180 reef no problem. Fairly clean but needs a good vinegar bath. Does NOT come with a pump, the Sicce Pump impeller broke, I took it off and proceeded to lose the pump. You could replace withe the older model PSK 2500 which is what it originally had or one of the new Sicces would work pretty well. Asking $100 picked up or buyer to pay actual shipping. Great Skimmer at a great price.