Yellow leaves, spotting, necrosis

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7.4 PH is too high bro. Listen to lifespan 5.6-6.6 before you pour it onto the plant. It's your super high PH

I wish it was that simple.. the 7.4PH you are referencing is the PH of tap water mixed with r/o water.. I should of removed that line of text, it is there strictly for reference. Plants never got 7.4, because nutes were added to that.

It it good to know the ph of your water, this way I can mix up my water at 50/50, ph should be 7.4, if it isn't I check my calibration of my tester.