Yes - I've see micro bubbles causing coughing, so I imagine that them bumping into the fish's skin might also cause a scratching reaction.
Jay
Hmm, I’ll try turning the filter down then and see if it makes a difference. I’ll be relieved if it’s just because of bubbles, but also a little dumb getting worked up over bubbles they definitely stick to the puffer’s skin since he’s a slimy little dude so would make sense since he’s the one scratching…
Thanks again, Jay. Hopefully next time I’m back will just be to say everyone is happy and healthy, haha.