I have 4 plants I
started the 12/12 cycle about 3 weeks ago and all has been going great all through the grow until now. most of the leaves have spotting on them. I looked up to diagnose your plants and matching the type of spots it looks like a calcium deficiency? I am attaching pics of the leaves and the whole plant
the PH is 6.5, temp in the room is 75 and humidity is 32
on the site it says you can use a Cal-Mag?
please need any help or suggestions on what i need to