What do you have for testing equipment? No offense..but you aren't giving us ANY info besides the pictures of the plants. We need to know what you are doing...
9 times out of 10 it is your PH.... do you even know what your PH is? You need to know this if you are going to be a successful grower.
They look deficient or another words lacking vital nutrients. It could be caused by a variety of things.
° Incorrect Ph locking out certain nutrients
° Not supplying enough nutrients (Underfeeding)
° Excessive amount of nutrients causing lockouts of certain nutrients (Overfeeding)
° Also in Hydro or DWC the nutrient solution should be 68* F, any higher and you have less than optimal dissolved oxygen content which is the reason for the air stone. Higher temps also cause unwanted problems such as root rot