By far the best you can buy !! I have a reef octopus right next to my BK,the octo does well but next to the BK it looks like me trying to race carl Lewis.i have owned so many skimmers in my time in the hobby that I can honestly say the Bubble King skimmer line is the best available to those who are willing to spend the money. It only uses 28 watts of power,is constructed of first class craftsmanship and have the best pumps on the market! Tom if your going to retiree the ETSS monster give these a serious look! Best money I have spent even more so then My AI's. you can also find em on RC usually for half price. They pull serious stinky thick skimm.