First, I can't see any cut around the mouth. The cut on the foot does not look infected, and in my opinion may not even be a cut. Additionally, everything else I see about the anemone looks good.
If your room is full of carbon dioxide how are you able to be conscious?

Atmosphere is about 78% nitrogen, 20% oxygen, 1% argon, and 1% everything else. I learned this as a Dive Master

If your carbon dioxide is above .05%, I'd be surprised

I wouldn't worry about super-saturating your water with carbon dioxide unless you were using a reactor or bubbling 100% carbon dioxide into your tank.
Microbubbles won't hurt an anemone as long as you aren't blowing bubbles directly into the mouth. After all, many of these anemones live near surf - and trust me there are PLENTY of microbubbles in the ocean.