I have a 160G mixed tank with half SPS, 1/3 LPS and the rest softs. There is also another 50G of water in the sump and refugium. I am looking to upgrade my current skimmers and was looking at your 9015, 9020, and 9420 skimmers. Which do you recommend? Could I use a 9420 for my size tank? How do these skimmers compare to the ATI Bubble Master 200 which is the other skimmer I am considering? I also see that everyone's sold out of your 9420. Any idea when supply gets better?