Appearing where? In the Display? You probably have a bad connection and when the pump is on, the waterflow will actually pull air into the line like a venturi.
Turn off the pump and see if all connections are good and sealed.
somewhere there is air coming in your pump like mentioned before check your connection its not suppose to be producing that much air bubbles. A pick would be helpful. It might be a defected filter thats all.
oh another thing you might have not pumped all the water in before turning on the filter and therefore there is some oxygen in it that is causing these bubbles. Make sure that you pump all the water in before turning on the canister
Thanks guys...I tried everything i could but to no avail.
I went back to the store, to get it exchanged, and the filter happens to be on sale today!
So now i have a new filter and I got some money back....so i can spend some more on other stuff lol.