On Mon, 21 May 2007 11:50:43 GMT, "Alan Holmes"
wrote and included this (or some of this):

As I've said before, I kept tropical fish for many years, breeding them for
sale to the local tropical fish shop, and I never, ever changed the water.

If your tank had a proper number of plants in it the water will stay
healthy.

I am not aware that, in the wild, it is necessary to change the water
in lakes, ponds, streams, rills etc or even to partially change it..


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