justiceman
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so experiment finished
starting water 8ppm
added Potassium Bi-carbonate to 50ppm
added 5g Veg+Bloom RO/Soft
came to 1.6ec with a ph of 6.3 steady
which is not where I would like to be
Maybe if I were growing Lettuce but not Cannabis
which would lead to using ph down
Interesting findings sir. My pH is at 6.3 after I mix in the powder but then of course like you said I use some pH down after. I'm guessing it really is the bicarbonates neutralizing the acids. I got my tap water tested at a lab for brewing beer some years ago and it could have obviously changed by now but it had pretty high carbonate/bicarbonate levels.
So maybe that 50ppm from my R/O is mostly carbonates/bicarbonates since at 50ppm starting water both our Ph's sit at 6.3 after mixing. I wonder if your 8ppm starting water without calmag or potassium bicarb can still get a starting pH of 5.9 with stability after mixing. hmmmmmmmm.
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