I purchased a FX5 several weeks ago and have not been able to get rid of air bubbles in the filter. I managed to get the air bubbles out once, but had to do 100% water change after that. Since then I cannot get rid of the air bubbles. I have done the following:
-tightened the fasteners on the in/out hoses
-in/out pipes in the tank are push all the way through
-I have tightened the rings on the cannisters as hard as I can
-I have put vaseline around the lid to make it air tight
-I filled the cannister as much as I could with water
What else could be causing the air bubbles? Should I look into buying all new tubing? If there was a tiny hole in the tubing, I would expect water leakage somewhere.
Any help is appreciated
I am getting ready to throw this filter out my apartment window I am so frustrated with this filter 
-tightened the fasteners on the in/out hoses
-in/out pipes in the tank are push all the way through
-I have tightened the rings on the cannisters as hard as I can
-I have put vaseline around the lid to make it air tight
-I filled the cannister as much as I could with water
What else could be causing the air bubbles? Should I look into buying all new tubing? If there was a tiny hole in the tubing, I would expect water leakage somewhere.
Any help is appreciated

