I did find a huge problem with my new skimmer. The other day it got really cold outside and I didn't have the heat on in my apartment. Well, the new skimmer makes so many bubbles that the amount of cold going into my tank overwhelmed my tank's heater and the temperature dropped 10 full degrees. I turned my heat on to 70 degrees in the apartment and the tank temperature went back up to 81 degrees. So far I don't see any damage but it sure was scary seeing the temperature drop like that.