OK I have pics now. You can see the brown/yellow spots on three of them, and some closeups, but I don't think it's PH anymore, since all five get the same water. Plus I tested the soil three times and got approximately 6.5 each time. Could it be heat stress? It is very warm in the box(see pics), which is weird because I have a 63cfm fan in there, theoretically replacing all the air every 8 seconds or so. And outside the box, it's only 72. Any ideas folks?


But it's not letting me upload all the pics. I have some of the growbox itself, but I cannot upload them also.