I just purchased a Kent Nautalis EX Skimmer for the sump of my 55 gallon tank. The problem? It's not skimming. I have it hooked up to a VIa Aqua 3600 pump and it has plenty of power. It's just not making tons of tiny bubbles like I'm used to with my CPR hang on skimmer. I called Kent support and he said it's not designed to make tiny bubbles (milky, I call it) like other skimmers. If I attach tubing to the air inlet valve that is built into the skimmer and blow I can make all those bubbles. I then thought that if I used the venturi discharge on the pump with the airline hose, then that would produce bubbles to skim (have not tried it yet). The Kent guy said that was not necessary, just run the output of the pump directly to the skimmer, no extra venturi is needed. Well, it's been running for 4 days with out the least bit of foam production. And the tank has been without a skimmer for a couple of months! I would have thought it should foam like crazy. Any thoughts?? Thanks!