CBD Strawberry Kush Indoors

Today one of my plants is suffering from lack of water and was displaying limp leaves. I was almost pleased with myself as I tend to over water. It should be in much better shape in a few hours. I have picked off a few leaves as some are yellowing. Tested PH of the soil and the nutrient solution and both are at 7PH. I will look at a few pictures to determine if I have a deficiency or perhaps an over feeding of a nutrient. It may be a magnesium deficiency, so I added more Cal-Mag to the water. I have sprayed some plain water on the leaves in order to keep the humidity up to 40%. Dry winter air in the house.