Discoloured, drying leaves

Hi my leaves are blotchy with a discoloured green. The leaves have gone really dry as well. Can anyone help me out with this one?

Pics below

When leaves curl up like that. Usually is a heat stress matter. If it was a deficiency you would have outstandings characteristics. The blotches could be a pH problem. Looks like your doing hydro. Do you use a ppm meter? What is your light source and how far is it away from your plant?

hey this is a good thread im gonna keep up with you Mista!!! so let me in on your info share ...
so i figured that win u do a hydro u have two temps. so if the leaves are curling up then the top temp is high but when they go down then your bottom temp is to high sume time not all but you can start there but the discolor IDK i have dry burnt leaves and heat stress so its all good as long as the new groth is doing better and better then u still got a chance.
im doing a dwc and its like a constant 90% in my box so i have boiling wate and hott air
hope u get your answers gl...

Ok. My pH is pretty good between 5 and 5.5. I got a ppm meter which measures in EC and my plants were between 1.9 - 2.4 EC which I read was really high. I changed all of my water over and they are all sitting between 0.9 - 1 EC.