You know some people have said when they dont use a skimmer or turn it off, the tank goes to S...T. Well I had the opposite effect. When I turned my skimmer on, its been going for 2 weeks now, and my tank has gone to S...T! Well not really, but I do notice a difference. My leathers are not as "fluffy" and my gsp its not as flowing. I just turned it off today, Ill see if they bounce back.