Bet you were curious about that one, eh? 
I've seen my rainbows on more than one occassion playing in the CO2 bubbles. Biting them, swimming in them, chasing each other through them. Is this harmful to them at all? I'm more concerned about the juvies I have that seem to like to bite them. Could they be "swallowing" them as well? Just passing them through their gills? Maybe I have fishy diffusers
It's not just my Boesemani kids that do this, but my Duboulayi and Parva juvies do it as well.
Roan
I've seen my rainbows on more than one occassion playing in the CO2 bubbles. Biting them, swimming in them, chasing each other through them. Is this harmful to them at all? I'm more concerned about the juvies I have that seem to like to bite them. Could they be "swallowing" them as well? Just passing them through their gills? Maybe I have fishy diffusers
It's not just my Boesemani kids that do this, but my Duboulayi and Parva juvies do it as well.
Roan