Help Air bubbles coming from filter

[Kubuspuchat3k]

Hi everyone, look to me like a have a little problem.
There are millions on tiny air bubbles coming out of my Fluval X5.
at least they look like air bubbles. Ever since this accrued my fish have been acting very strange. Did anyone come across something like this ?
Like always thanks for the help.

 

[Fishguy2727]

There is either a lot of air trapped in the canister that is slowly working itself out, or there may be bubbles too close to the intake. Theoretically a tiny hole in the right spot could allow air to be pulled in to the filter, but is much more likely to leak water.

 

[HUKIT]

I find the FX5 starts to blow bubbles when it needs to be cleaned. It cycles on/off every 24 hours to re-prime. I would start with a tear down and rinse the media and sponges in the tank water the re-start it.