Is this a magnesium deficiency?
View attachment 2366863That is what I am thinking looking at leaf chart. Would like some opinions from more experienced growers. Started after cranking up the light, I actually reduced it before noticing this today because the plants were droopy before bed the other night, when I turned it up they were praying for most of the day but near lights out they all looked like it was a tiresome day. The spring water I have been using is processed with ozonation. From reading up on what that means, it removes heavy metals, and the one of examples they had was it pretty much removing all of the magnesium.