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Re: [APD] Most tapwater has little CO2

On Mon, 21 Mar 2005 12:56:14 -0500 (EST), Richard J. Sexton
<richard at aquaria_net> wrote:

> Fwiw, all tapwater I've ever had: Burlingto, Waterloo, Toronto Ont,
> and Los Angeles (PV) all had serious amounts of CO2. So does my well
> water here. I think it's the pressurization that does this, which you can
> easily demonstrate to yourself with a python.

My aquarium walls pearl after a water change.  In an unplanted cichlid
tank.  If I drop a hunk of wood in there -- that's wood that's been in
water for a while -- the nucleation sites are much better than the
walls of the aquarium then the wood pearls like crazy without the
walls pearling.  That's probably because the wood has better
nucleation sites than the walls.

I inject a lot of air into the tank with a python.  I tend to expect
that people who change water by means of a python will experience a
lot of pearling, or outgassing, from the water change.  I'd be curious
to know if people who use buckets to change water experience the
pearling that python users have noted.  I still believe it's
outgassing, not plant-induced pearling.


"When his IQ reaches 50 he should sell"
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