@Zurban_Poison, yeah i guess you just watch a plant how it's affected by it then you can automatize your grow without ppm , but still if you had tds/ppm meter :D would be much better👍
Just amazing!
Could you give some more information about the defoliation of fan leaves/branches at this week (week 4)? Also, it says you did HST at week 4. Is that correct? Couldn't clearly see that anytime before week 7.