well check the way the leaf margins are turning upward, but the veins are still nice and green... this page says thats a Mg deficiency:
Marijuana Nutrient Disorders
look at number 3 on that chart and then tell me what you think. it matches most closely.
im still following your advice, everybody, but im trying to exhaust all possibilities.
i need to nail this problem! it always happens to me in a DWC setup... i can grow perfect in just about any other medium, but my damn soil was on backorder so i got impatient and started up the old setup again
EDIT : To Farmergiles, i didnt
see the plants but i know they were grown on blue mountain, in Jamaica. ive gone several times and have a reliable, trustworthy hookup there. they just call it the hi grade, but it was some of the dankest ive ever seen. and coming from fertile Jamaica, i would figure that would make them want tons of fertilizer, thats another reason im thinking its that Mg deficiency..... but well find out soon enough