Promix bx, phed water to about 6.2 AN three part for nutes. I have supplemented calmag twiceWhat kind of water are you using??
And what kind of medium?
How often do you water?
Do you ever add calcium to your soil or feedings?
I doubt it's calcium as it seems to be just a few affected leaves at random where deficiencies show on lots of leaves in the same class but have to start somewhere.
It looks more like physical damage from possibly water sprayed on for a foliar spray? Or even some fungal disease.
How's your humidity and temps?
This is right. That is calcium deficiency. 6.2 ph is too low. Especially if you are talking about your solution and not the soil. In that case, your soil ph is, likely, even lower. You miss out on lots of nutes at a ph of < 6.4ish, especially cal will show that low. 6.4/5 us optimal for veg, with bottle nutes. You'll see a big overall difference after raising it. You will sorta b chasing your ass on the cal def, though. Once u see it, you won't completely straighten it out. Don't try and dump a ton of cal to fix it. You'll end up locking out other nutes. Just reg doses, and heavy every other one. Keep your ph mid 6s, next time, with some supplementation,and you won't see it ever again.Raise your pH to 6.5 and it will stop.
I agree! 6.2 is a touch low for soil...and I agree R Burns. Calcium deficiencies can be a pain to accurately diagnose then fix. But I've found that it's not uncommon that raising your PH a bit helps a lot with it. Especially in soil, because it usually has calcium in it, it's simply out of reach because of PH or etc.Raise your pH to 6.5 and it will stop.