thats if i ever get going V.
took me a week to work out where the decimal point was on my EC meter just to get PPM via uS/cm
so eventually i worked that out only to find theres 3 different scales of PPM!!

check chart below...
View attachment 172222
so WTF is the real PPM can sumone tell me ? Anyone any preferance for HANNA , EUTECH or TRUNCHEON ??