Help with leaf spotting please

So three of my plants are looking like this and the rest are fine. DWC, Lucas Formula with Calimagic supplement. PH right at 5.9 PPM 1000.

So weird. Is it missing some nutes or too many? I haven't the slightest what's going wrong. Please offer suggestions!

Needs more cal/mag

Serty97 said:

Needs more cal/mag

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Thanks buddy, I've been using 20ml per 5 gallon. Do you have a recommendation on how much I should up it?

Agreed. Calmag should fix that for you. just bump it to 25ml/5gal That's normal dosage I believe. 3-5ml/gal

Plant Doctor - Diagnose Your Plants! | Grow Weed Easy

Take that link and keep it in a notepad and save for future diagnostics. It's helped me a few times. Skipped waiting time asking others and went straight to working on what it was.