gotcha here Ill give u sum likes if that helps out any.. Im not sure about how it works on the iphone but is there an "image" icon or anything? if so try to select it and then paste the "image location".
and while you're at it, tell us medium, lights, nutes, temps, rh, ph, and take a pic of the effected area, and the whole plant, in normal light....all that will be very helpful
Your plants are pretty "pine green" and leaf tips are burnt. That's over feeding, but the plants look healthy otherwise and not seeing other pics, so you can try more cal/mag to support the nutrients you're trying to push. I would back off the nutes personally though.