Looks like cal deficiency, but i don't know

I feel this is the beginning of a PH issue in the medium. Also the tips of the leaves are starting to curl showing signs of heat/nutrient-water/humidity stress. If you temps are accurate at 25c it is not heat stress. I would look into PH and nutrient-water stress. Soil grows do best aorund 6.4-6.8 in my experience. Best Of Luck! === Seems I have a fake troll account trying to cause shit by emulating me. They even went as far as to copy my profile picture and response to there troll lol. Someone sure is but hurt. m"Q"use is not @m0use Q vs 0. Q is fake like Q-anon Sorry for their rude comments on your question. I have no idea who they are or why they are doing this. Please hit complain and report this to Growdiaries. The real m0use profile is 2+ years old in age and has a higher rank. It's got the gold emblem on it, easy way to tell. ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***

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.