someone help...... what is this?????

have u been adding cal mag to ur water,if not,u better start asap

Yup, Cal/mag. looks like you have to much P&K going also?
What are you using and how much, how often?

looks like Marijuana

I always add a little pinch of epsom salts to every water, cut the nutes and plain water and epsom salts or cal mag, i also use seaweed extract as a tonic, vitamin b would also help stressed sick plants.