This is a topic that seems to have no resolution. In SW
, the O2
exchange happens at the surface of the water, ie: surface ripple, which causes gas excahnge and a stable pH. I would get rid of the airstone and keep your pH stable, by pointing phs towards the surface, in order to cause surface ripple.
The reason I said this, is the ocean has microbubbles, due to the crashing of the waves, and doesn't seem to effect the fish (at least not fish that reside near the surface of the water). I have read that microbubbles can cause problems, but have also read they don't hurt the fish.
Hopefully some one can elaborate further.....