Re: water changes and bubbles.....

["Zsolt Fazekas" <fazekaszs@hotmail.com>]

It is because the water is under high pressure in the system of the water 
supply, and under such a pressure the gases  (nitrogen, oxigen, 
carbon-dioxid, and so on) are fully dissolved in the water. When the water 
flows out of the system (tapwater) the pressure suddenly drops at the outlet 
and the equilibrium between pressure, temperature and ammount of dissolved 
gases are upset. Then the tapwater becomes "overdissolved" in gases at a 
lower pressure, and starts to release the gasses, creating tiny bubbles, 
soon until the equilibrium builds up again, depending on the now lower 
pressure and the surrounding temperature.

The lower the pressure is and the higher the temperature is of the tapwater 
at the outlet, the more gasses are released.

I read somewhere that the overdissolved gases can cause diseases similar to 
the divers (tiny gas bubbles appear in the tails).

Zsolt Fazekas



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