I seem to run my skimmer much different than most reefers, I run it now on a timer 6 hrs a day. I really think there is a lot of good stuff removed with skimmers. I must say that I have a extremely efficient skimmer possibly too efficient. Bubble king 300. I also really think my refugium is a real plus. Gfo, minimal carbon and a lot of water changes 10% a week, and really a lot of food.