Does anyone use or has anyone used this line of protein skimmers? How do they rate, compared to the needle wheel types out there? Are they "set and forget" or do you have to constantly fiddle with them to keep them working right, like the needlewheels? Would one of the larger ones like a 9015 or 9010 be good enough to use on a moderate to heavily loaded tank (mixed reef) of 120 gallons? Thanks!