To specify, the spots appeared about 2 days after adding the 3000w light, about 9 days ago. I watered with the cal-mag for first time during grow at full strength, waited until the soil was fairly dry and fed with fox farm at half strength (had been feeding full until now), and another full...
I am thinking I have a Calcium deficiency. I am useing Fox Farm Organic Forest with the Dirty Dozen line up fed full strength as scheduled. I was using distilled water without cal-mag. Once I saw the spots, got cal-mag and watered and have fed FF nutes at half strength with another dose of...