airstones most certainly do add oxygen to the water, and the secondary purpose of
good aeration is to move all kinds of gases out of the water, including toxic ones.
Fine bubble aeration also throws the bubbles up into the air, which vastly increases
the surface to volume transfer. GF have a need for excellent aeration, especially
the large bodied, long finned ones. Ingrid

For all intents and purposes, none of your options adds measurable oxygen to
the water. Their prime purpose is to circulate water so that carbon dioxide
can be exchanged at the moving surface for oxygen.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
List Manager: Puregold Goldfish List
http://puregold.aquaria.net/
www.drsolo.com
Solve the problem, dont waste energy finding who's to blame
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Unfortunately, I receive no money, gifts, discounts or other
compensation for all the damn work I do, nor for any of the
endorsements or recommendations I make.