I could understand that.
But, If you use a bubble counter, it would be impossible to have anything
but pure CO2 enter the stone. Eventually deposits from the tank can form,
but it is unlikely as it should (theoretically) be forcing the aquarium
water away from the stone at all times. The wooden stones will generally
produce a superfine bubble, much better than ceramic or "stone" airstones.
The only airstone i have found that rivals a wooden stone (for the size of
bubbles) is the RENA airstone
(http://www.bestpetsupply.com/brands/...Pharm/1617.asp).

--
Matt C.
http://home.comcast.net/~amgock


"www.Fish-Forums.com" wrote in message
...
The moisture from the yeast and sugar will escape sometimes into the
stone or wooden diffussor and can clog it.
Usually a vinagar bath will fix this.

Marc
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On Wed, 03 Nov 2004 00:52:20 -0500, The Drunken Lord
wrote:

On Tue, 2 Nov 2004 16:57:56 -0500, "Matt C."
wrote:

How will the CO2 clog up the wooden airstone?

The C02 bubbles clog it up.