really??? i've been using this ratio -
Jacks 321 @ 6grams/5gal
Cal-nit @ 4grams/5gal
epsom salt @ 2gram/5gal
orca @ .5tsp/5gal
consistently at 425-450 pms for the past month, and i haven't gotten nute burn until now. that's odd.
it's also only on that cola, nowhere else has purpling/yellow tips...