PPM/EC readings

[adeyren 14]

Am a total newbie bout to start my first ever NFT grow. My tapwater is 390ppm which equates to 0.7/0.8 EC. When i add my nutrients i presume this EC reading will go up? So do i take my original EC reading as a base figure and the increased EC reading as the true figure ie new reading minus original reading equals EC i need? Sorry guys bit confused here so forgive me.

[Dust 6,284]

well that's a question to which you'll get both points of view ^^ Some people say read it with the tap water inside, some don't count it inside, personally i only use the EC values to have a mark of A level, like a reference, so that way you can control if you want more or less of something, but don't only judge byt the EC to feed your girls, the most important value is the plant itself, no matter if you run a 2,3 EC or a 1,6 if you're girls is handling it and is asking for more or less

That beeing said i suggest to alway start on the low doses to have your "reference" and go higher and higher with weeks, so let's say the safest for you is to read the EC with EC of the Tap water included. The more you will use your nutes and the more you will know your line and what yur girls can handle.

Good luck man