By what I read through this thread the light is being turned down with no improvement, the op is giving calmag also to no avail, and the plant is getting worse. some of those leafs are looking familiar.
Not necessarily too close, but turning down the intensity will help trigger the remaining white pistils to turn amber/orange. They remain white when receiving high intensity light. Raising the light would have the same effect as lowering intensity.
I’d use one controller. It has 4 ports. I see you are controlling 5 devices? Put the heater or humidifier or both outside the tent in the lung room. You don’t need 3 controllers to run a single tent unless it’s 4x8 or larger.