ZAMALDELICA by ACE SEEDS

Having grown this strain before, I can say it likes very mild feeding and burns easily. Although you have no details at all in your diary about what fertilizers you are using, I would say this is actually burning from over feeding. Yourr plants are very dark green, Zamaldelica being a pure sativa, should be a more mild green colour when healthy. Try giving just plain water for the next 7-10 days before resuming feeding at half the strength of whatever you were doing before.