I just upgraded my tank from a 10 gallon to a 300 gallon, and I bought a protein skimmer. My tank is about 2 weeks into the cycle and Ammonia is at 0 nitrites at 0, nitrates at 5 ppm. I just hooked up my protein skimmer and I saw no bubbles at all in the skimmer. Is this just because its a new tank? or is the skimmer faulty? it is a Hydor performer 1005 skimmer.