Help! Problems during flower

FWIW, I had one plant start to show yellowing and burnt leaves a few weeks into flower and then a second plant started showing the same symptoms. At the time I was using 75% of the recommended CalMag in my nutrient mix. I've since increased that to 200% of the recommended CalMag dosage and so far the problem has ceased, meaning I clipped off the discolored leaves and since increasing the CalMag, no remaining leaves have turned yellow or brown.

Hope that might help!

:peace:
 
I am currently installing a second AC system (10500BTU) putting my system at 17,000 BTU, it'll keep the temp at 75 constant with no fluctuations. I am going to do a complete flushout just in case it's lockout and I have my probe to make sure they're not getting overwatered. I will report back shortly to let you guys know if the situation improves.

I can't thank you guys enough. I truly appreciate all the help and suggestions. I think it may have been a combo of heat and overwatering but just can't tell for sure just yet.
 
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