[APD] Re: Water Changes

["William M. Cwirla" <wcwirla at verizon_net>]

Right you are!  I wasn't thinking mathematically in terms of an 
infinite series.  A 50% water change regimen would result in twice the 
original concentration of anything, assuming no consumption.  Good 
argument for 50% water changes.

Thanks for reminding me of my high school algebra class.  It's been a 
long time.  (Use it or lose it, as they say.)

Bill

On Jan 4, 2005, at 1:39 PM, aquatic-plants-request at actwin_com wrote:

> If you change 1/n of the water each time you add a nutriment
> in a concentration that would be C once disolved in the tank
> AND if the basic water doesn't contain any of it,
> you will get MAXIMUM n*C as the concentration for this
> nutriment in the tank.
>
> Philippe

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