rkymtnman
Well-Known Member
i do EC for just that reason. EC is EC. ppm depends on what conversion it is based on .5, ,.7 etcHey rkyman as I mentioned I'm just now starting to get the hang of ppm and ec and have a few different meters to compare contrast with and until today I was running off ppm of a conversion rate of what I'm assuming is .5 but now I have a meter that measures both ppm and EC in us/cm and my ppm is measuring 365-375 and EC is measuring ~0715 which is .715 EC correct?
Question is using RO water I was under the impression that 3-400 ppm for 3-4 week old plants or so was a little on the low side of what I see most people running, plants are nice and green, am I headed the right direction? Thinking once they get 3-4 nodes I will up it to more of a 700-750ppm so an EC of roughly 1.5.
this is roughly what i go by for my EC:
seedlings 0.2 to 0.3
early veg 0.5
veg, transition,almost all flower 1.0 to 1.2
late flower 0.7 to 0.9
RO is great to use in that what is in the water is what you put in the water.
what nutes/additives do you use?