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- #21
It totally pays to watch your leaves so def keep that up. I misdiagnosed similar spots around the same age as a Mag deficiency. I add CalMag and things got worse. Turned out my PH was way too high, PH fluctuations can cause a variety of leafing problems, early spotting on lower leaves for example.
We talked about soil and nutes, next is water, what kind of water are you using and what's the PH. If you're using tap water it usually runs high, not sure about that mix it could be off too. If you haven't already, grab a General Hydroponics PH up / down kit that has all needed for PH testing and control for under $20. There are digital pens but I'm suggesting good budget items. I went into this wanting to spend as little as possible. Ugh...
I've heard of people that misdiagnosed there plant for calcium and magnesium deficiency, so I'm with you on that. I use regular tap water, I was kinda doubtful about buying a digital ph tester cause its pretty expensive and I've read that tap water is not bad but not the best either so I'll look into that ph testing control you wrote about. I feel you on the budget problem lol