yes, yer ppm's are coming out lower cuz the plant is eating.
maybe your ph is coming out high because of those days flushing with non ph'd water? if u flushed with tap water than it probably has a higher ph than desired. 6.9 run off is high for coco.
ph and ppm run off from coco are not 100% accurate but they still give you a rough idea of whats happening in your medium.
my run off is usually close to what it was when it went in, ppm and ph wise.
wonder why yer havin soo much trouble... got any recent pics?
they look pratically the same as the pics that i posted on page 28 of this thread, just with some yellowing of the more damaged leaves and there's tiny little new shoots on some of them.
i flushed with ro water that's at about 6.5pH and 0-5ppm.
my runoff is getting more consistent, they must have been starving after two days of flushing.
i'm pretty sure most of my trouble is the irrepairable damage casued by the obviously imbalanced diet they were getting.
i'm going to hit up some dispensaries tomorrow and see what i can find to just replace the most tore back bitches. a couple of my hindu skunks will be able to provide cuttings so i don't have to repurchase that strain, but i'm not as optimistic about my gdp or purple kush.
really sucks, too. most folks that grow from seed probably think buying clones must be so easy...i drove almost five hours round trip for my gdp cuttings to get them from the gdp collective in san pablo, ca. their unique gdp strain is one of the most beautiful cannabis plants i've ever seen and the smoke is on par with everything else i've tried. at least if i have to go back i can ask about the genetics...
also, i'm going to run some of this next batch in a new dwc setup that i'm working on right now. that way even if i fuck up with the coco again i won't be so screwed.