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Old 01-11-2008, 09:33 PM
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Ok now i see why this will not work...

Quote:
Home made conductivity meters, made by using home made electrodes and taking the inverse reading of an ohmmeter reading are inaccurate. One reason is because of the method in which EC is measured. Electrolytic conductivity can be measured by either the alternating bipolar method or the electromagnetic induction method. Both methods involve applying alternating current (AC) voltage across the poles or coils. An ohmmeter applies direct current (DC), and thus does not meet the requirement for measurement. Furthermore, when an ohmmeter is placed in a nutrient solution, the hydrogen ion buildup on the negative terminal will act as a resistance and cause a false reading.
Taken from: Everything you need to know about EC,PPM and TDS - EDIT Forum - Lifestyle Discussion Community

But if you have questions about where your salt buildup is coming from this is still a good way to do an inexpensive comparison of water...

In my case my water coming out of my PUR 3 stage water filter had a lower resistance and therefore higher EC level...

And even my tap water has a higher EC then i would like it to have in comparison to my nut solution so i will start buying distilled water...
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I just know i planted them around here somewhere...=]
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Old 01-11-2008, 10:22 PM
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Just water your plants and relax
 
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