That def. looks like a ph problem....have you calibrated your meters lately? It can't be over ferting if the ppm is at 94. Especially since the entire plant doesn't seem affected. I wouldn't use the salts...get some clearex it works great. And I doubt its heat stress if you are only using flouro's

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Marijuana Defiency Guide...all the stuff now on pg 1!!http://www.rollitup.org/marijuana-pl...tml#post404474