Small Hydro grow fan leafs weird brown spots

Hey guys i have to plants growing hydro at the moment one plant is huge and healthy the other is healthy but i had to remove 4 fans leafs that had multiple brown spots on them. Both are now getting the max recommenced nutrients (I started them off low and worked them up) and both have the same water source.

usually cal mag, whats your ph of the water

Based on the overall color, you are giving it too much nutrient. The parts that aren't spotty look over nitro'd.

Ph nute lockout same thing happened to me. Fix the ph and it will stop that. The leaves wont come back that are already damaged but will get slightly better. Stop pulling off leaves btw it fucks the plant up man that where there energy is stored. Fix the problem don't try to make it unnoticeable.