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Fertilization meter

To: "Aquatic-Plants at actwin_com" <Aquatic-Plants at actwin_com>
Subject: Fertilization meter
From: Sherlock Wong <wong at dt_wdc.com>
Date: Tue, 06 Apr 1999 16:14:59 -0700

Check out 

http://www.hannainst.com/products/testers/fect.htm

for a gadget to electronically measure the fertilizer
concentration.

Comments?

Sherlock Wong

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