Looks like cal deficiency, but i don't know

It could be calcium - and the calmag you've added should help ... you might want to use some epsom salts to give it a stronger shot of magnesium. I've read through your last notes in your diary and think that the delay in their nutes (you did the right thing, btw, in waiting since it was so wet) is probably what started these problems... I think you just go gently - add a bit of calmag as you're doing, maybe some epsom salts as well and just continue your normal feeding... things SHOULD straighten out. Good luck! Please click on the grower's name that is answering your question to see their profile. There are fake accounts being created to look EXACTLY like real accounts - but they're easily identified by doing this... at this point, it is only myself and m0use who have been affected.

You know its light burn, cheeky.