i know alot of growers use sulfuric acid in veg and phosphoric in flowering,they can use these elements,i changed the water today and made a different nute mix,i think this is a deficiency of some micro nutrients but i dont know witch one,
-ferst 1 npk 8-8-6
(N) - 8 %
(F) - 8 %
(Ca) - 6...