I'm going to be starting a 220 gallon tank with a 30 - 40 gallon sump, so it's about a 250 gallon setup. What kinid of protein skimmer do Ii need for that kind of tank? Should I get one that is put in the sump, or outside of the sump? Also, when browsing skimmers, how do I know that it's sufficient enough for a 220 - 250 gallon setup? Any advice on thiis topic would be great. Thanks!