Is my fan failing?

Hi everyone - its been a while. I took off close to 6 months and am now getting the Grobo back up and running.

I remembered having a lot more air bubbles than I am seeing now. I hooked a smaller air stone to the Grobos tubing (pics below). And I have an aquarium pump to add. It has 2 lines, I am thinking it looks like too much air to use both. Pic of 2 lines and 2 different stone filters below.

Can we have to much air? I did find that too many bubbles were getting my pod wet.