Bubbles in my laser tube

I am a little concerned as all of a sudden I am seeing small bubbles going through my laser tube. What does it mean? Please help!

Bubbles is almost 41.

Does it appear to be leaking fluid?

I recall seeing bubbles once on mine when it was clean and it was fine. (Not leaking though)


A small amount of bubbles is fine - large bubbles, or lots of air gap you need to reach out for Support.
Example of small bubbles:


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