Microbubbles?

[Ohhithere]

I think I have micro bubbles coming from my temp HOB filter and creating turbulence into my return. How do I get rid of them?

 

[MurphyLong]

I have a LARGE HOB on my little 37g tank, and I was getting micro bubbles too. First, I adjusted the filter with the built in leveler that pushes it away from the glass, if yours doesn't have that, you could use a wash cloth or something, since it's temporary. If they still persist after that, raise the water level in the tank.