Hi
Yuhknow i posted a meter called Truncheon by Bluelab. This is by far the best
meter ever. Don't remember how i found it but it beats out anything i've seen
here yet.
This measures PPM's of your water. Measurements are converted to EC = PPM.
In this country we use ECx500 = PPM all done instantly converted.
No chemical solutions to calibrate it.
Stick it in the water or nute solution you want info. about and instantly know
your PPM's...This way you can mix up your nutrients and know the amount
you are adding.