I just picked up a my first protein skimmer today for my 55 gal SW. The tank has been setup for a few months and the canister doesn't seem to be filling with anything..... I adjusted the air valve and left it for a while and came back to a canister of clean water....... plus it seems as if I open the air valve at all it loads my tank with tiny bubbles...... any ideas ???? I have been using water conditioner/slime stuff for my water changes lately.... any help would be appreciated.......