this is just crap, ppm or ec so what if it works for the grower so be it, to many people get anal about shit and lash out .. new growers need to learn to listen and read , they ask the same questions over and over and still dont accept help, if you know the answer to your stupid question dont ask , alot of people have left the forum ,alot dont post any more some cant be bothered at all to help - all because of the arrogance of some new growers and stupid way some carry on peace out ---