hmm... that's not how I would figure it
I would set your EC to 1.3 total and finished including the source water
then if your ph is climbing super fast with in 2 days you've gone from 5.5 to 6.5
then increase the EC
think of it like this
if I put a glass of mineral water in front of you you would drink it and be happy
if I put a glass of salt water in front of you, you might try and drink it cuz your dehydrated but its going to actually dehydrate you more from the high salt content
minerals are salts... theyre all salts!
the more you add the saltier the water
salty water means your plants will drink less of it or try and drink the water and leave the minerals behind which causes your EC to climb
the 0.4EC in your source water counts toward that salt content... removing it from your total EC is a mistake
I don't know if I already posted this with you
Originally Posted by OldPhart
Basic cheat sheet:
Ec goes up, PH goes down=plants require less nutes.
Ec goes down, PH goes up=Plants require more nutes
Ec stable, PH goes up=Equilibrium=Good thang.