Need help fast!!! i dont think its normal

hi i have a total of 3 plants and this ones' leaves are doing this



looks like brown spots on the leaves and on the edges

what do you guys think? latrely ive been PHing my water and use 4 tablespoons of foxfarm big bloom to every gallon. the plants im guessing a month from harvest and stand @ 2 feet

Ozone damage? what can cause this. i have all 3 plants in a seperate room where no one goes.

Any ideas?

if you dont have an ozone generator then it very highlyalmost impossible that it ozone burn

its probally magnesium def. get some magnesium sulfate , ( epsom salts) and put one teaspoon to a gallon and water it. even if its not magnesium def the salts wont do any harm.