Question about bubbles

[PteroisVolitan15B]

This may sound weird but my tank is full of microbubbles. They appear to be coming thru the return lines, but there aren't any bubbles in the sump and I didn't notice them until I put my glass canopies on. Does anyone know any tricks to stop them or figure out whats causing them? Thanks in advance

 

[GlaringToast]

A small leak near the output of the pump is creating a venturi type air input, this method is used in protein skimmers to create super fine bubbles, which helps in a protein skimmer but not your display

 

[Lorna]

check all your plumbing connections as stated there must be a leak where air is entering the system.