Hmm...its been over 24 hours & I can't figure this thing out. My tank has been running only for about 2 weeks now...its a Biocube 14 with 10lbs live sand, 15-20 lbs live rock, 2 damsels. Either I see nothing at all in the catch-cup or if I crank up the air a little it fills with clean water from the bubble mist within a few hours. Will a new tank that is still cycling do this to a protein skimmer?