EC or electrical conductivity is highly dependent on temperature. wikipedia is your friend if you want to learn something.Im confused again lol. So if your conversion is .5 and your using a TDS meter and your ppm's are 500 is it not true that your EC is 1000 but your ppm's are still 500? Is this why when people say there running 1500 ppm's they actually are using an EC scale and in fact its 750 ppm's? Sorry for confusion lol.
Actually I'm not that confused. When i read people are running 2000 ppm's i can only assume they mean ec reading of 2 and there "ec" meter is reading 2000 like mine does. I would love to see a plant at 2000 ppm's! I should have stated my post better i guess.EC or electrical conductivity is highly dependent on temperature. wikipedia is your friend if you want to learn something.
http://en.wikipedia.org/wiki/Electrical_conductivity_meter
I've had plants up to 1600ppm and they were fine. It really depends on a lot of factorsSorry 1600 ppm's but even that IMO would kill a plant would it not?