Hello, I'm looking purchase one of these three protein skimmers. I have a 90gal. with medium bio-load. I do tend to over feed a little. 1. Reef octopus 4 2. SWC extreme 160 cone 3. Bubble Magus BM-NAC7 cone. Which one is the easiest to adjust and does one last longer than the other as far as the pump goes. Any suggestions would be very helpful. Thanks.