Recently purchased the Co2 Diffuser from Aquarium Co-Op's website. Unfortunately, the bubles do not come out of the diffuser. The Co2 is coming out of the lining instead. This is not an issue with my other diffusers.
Note: I do have Co2 lining. Is there a way to seal the tubing where it connects to the diffuser? I ruined my last one trying to super-glue it tight, and had to buy a 2nd -_-