i have an airstone i my tank and it has done great since adding make sure it is no deeper than 18 inches deep, in the water, that will also add to the gas exchange, the place in Hawaii that breeds the expensive horse has helped me out alot with my questions and i have never ordered anything from them, it an easy site to find its seahorse and of course the dot com...
i think the old rule was no airstones for the reason of bubbles, but in the present people are saying unless the male is doing a dance and opening his pouch in the bubbles they are ok and even then most can get the bubble out, just what i have read.
if the stone makes you nervous just add an air line in the tank without the stone