okay i got a berlin turbo skimmer and it doesnt appear to be workng ? notihgn at all is in the collection cup no bubles are makign it to the top part of the skimmer the tube to the collection cup and i do isee very minute and speraticly bubles in the outer tubei know its supposed to be bubless but a very very veyr few hear and there? i dunno wat to do is my tank to new? not enough polutants? or what?