I won't, you have proven yourself to make zero sense! You're giving the wrong info, far too many times..again, it's not my concern, it's not my plants..you do as you wish, it's up to individual members to then do their own research and figure out what went wrong. You contradict yourself far too often. Again, happy growing, im done with this lol. What makes no sense is you're telling people growing in coco to ph to around 6..why not 6.5? Your chart shows 6.5 is much better than 6.0. Again, that chart is for soil. Maybe this will teach you something..i have charts too lol.
Just to chime in since I was quoted (still not sure why) but OP, this chart is much more accurate.
And I'm not looking to argue either, but no one (even the OP) knows what his PPMs are nor do we know the quality of his medium.
Coco coir is noted for having high amounts of K and Na.
K complete with Calcium and Magnesium uptake...but too much Mag will lockout Manganese and so on.
Without knowing what the EC/PPMS are going in its best to err on the side of caution....especially with a grow that already appears to have salt build up.
OP, its up to you...its your grow but I would absolutely drop that PK booster and get a meter stat. Until then, go with your base nutes at half strength. Its much easier to fix a hungry plant than it is to deal with toxic salt build up...especially in flower.
Edited to add something else I keep forgetting. Measuring run off in coco is not a reliable way to obtain the ph.
Coco retains a lot of cations due to the abundance of K positive ions. Essentially, the Cal, Mag, Iron cations will remain in the medium instead of draining out with the waste run off.
OP. Mix a slurry of roughly 2:1 distilled water/and your medium. Wait a few minutes and test.
This will give you a more accurate measurement. (skip the 10$ garden probes too as those are completely useless and rarely if ever accurate)
Also, as your medium dries your ph will rise on its own giving you some fluctuations.