i wouldnt put ozone in an airstone, unless its in an air tight bowl, or tube or air tight reactor. Even low levels liek ibelieve .08 or .8 ppm will cause premature mortality, and all the ozone wil leak into your house, eventually if it builds up to a certain ratio if O2 to O3, it could possible explode
this is just em and my 9th grade brain, talk to randy holmes-farley
hes a chemist who i was talking wit hin a thread abotu ozone safety