What ec meter do you use? American ec meters are normally calibrated to .5, European .65 or .7. I just take all my measurement in microsiemen (uS) as ppm = ec(uS) x (conversion factor (.7,.5 whatever)).
Whats your conversion factor? 700ppm at .7 is 1000 uS(microsiemen) afaik.
At .5 its 1400 uS.
Thanks
Reason i ask is i also use 400w hps's and like to know the max EC for said wattage.
Anyone used Fatmans Bloom Drain to waste formula?
I need to talk to the guy but every site bans him cause they cant handle his personality. (wimps)
Any info would be greatly appreciated.
Im currently using GHE 3 part in soiless mix (coco/verm/perl)