... well, to be honest, I'm not a coco-nut myself, still a soil guy! ...but I see so many coco prob's in Sick Bay, that I've had to learn enough to help diagnose problems related tom it's characteristics,... Check out other coco growers, and see about that ppm value,... might be a bit high for the sheer frequency going in,... pH is fine,... and if you monitor the r-o often, then your good there too,.. shouldn't be more than 200ppm or so more than inputs I think..? Keep in mind as they finish, demand for PK will taper off, they just aren't burning though it like in early-mid bloom,... lots of variables there, take that as a generalization; each strain, even pheno's can vary in their appetites,.. part of the learning curve is reading the plants, knowing such fine details of evaluation is an experience thing,... easing off some the last couple weeks can be wise, and reading the fan leaves as well... how much are they fading, getting tapped out,.. this tells you how much they are tapping into reserves, which is fine as you don't want nute loaded plants at the end! this is what the "flushing" deal is about,.. forcing the plant to use up reserves at the end,.. pop22 has a good thread on this in the MythBusters section,... a lot of contention there about this, but I say it depends on the feedings heaviness, how much the fans are fading, symptoms of defc. (or toxicity!),... if the plant had lost a lot of leaves, faded fans, then flushing time my be reduced or even skipped, according to some folks,... you'll see there, too much to relate here now,....
