hello why does the ph from 6,5 after 2 days rising...

pH, EC(electric conductibility), temperature of the solution, room humidity, room temperature this are all daily vital parameters that a hydro grower needs to monitor, adjust and tune constantly. Best of luck with the grow! looking good so far (as much as the led light allowed)

I used to grow on Hydro and I'm growing on Aero. So I have to look up defensively every day and correct at least every second. But rather every day, since they drink so much water that I have to correct them when I empty them 😅 Correcting once a week is very negligent, and such statements are made normally also not @ ElevatedNoob :-( You just said that you have never hydro-grown yourself and risk using statements that damage the plant and that at some point people no longer want to grow because their plants die.

Hey @Septicimia. I'm not a hydro grower but I think most people anticipate this drift and just start a little lower with the initial ph... Once you get your mix down I think it's a weekly thing instead of daily... happy growing ✌️👊