I recently woke up and went to my computer only to hear a sloshing sound inside my closed loop thermaltake water 2.0 performer water cooler. I looked at it and didn't see any leaks. I don't think that there is supposed to be any air inside this cooling system so should the sloshing worry me? I am using the AMD air cooler for now but I am said with the quality. Do I need to get a new cooler or is my water cooler fine?