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Subject: Re: EC Meter for hydroponics
Date: Fri, 22 Nov 2002 08:02:56 +0100
Organization: Guest of France Telecom Oleane's newsreading service
References: <3DDCF7A7.675229A3@xympatico.ca> <firstname.lastname@example.org>
NNTP-Posting-Date: Fri, 22 Nov 2002 07:02:51 +0000 (UTC)
X-Newsreader: Microsoft Outlook Express 6.00.2720.3000
I agree with you Steve : it is possible to evaluate the overall
the first message was ambiguous (for me) :
>it will [...] tell the concentration
>of the elements in the nutrient solution.
I understood he was looking for concentration of each component ...
Mathieu = :c)
> EC is used as a passable measure of Total dissolved solids for water
> soluble nutrients in hydroponic solutions. TDS/EC meters can be bought
> for around $30. In a propely balanced nutrient formualation, all the
> components are removed at a uniform rate, so the EC falls and predicts
> that the solution is becoming exhausted. The proviso is that the pH has
> to be carefully controlled and that measurements are made at the same
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