You can lower pH ~0.5ph per half cup Epsom salt for a gallon of coco, Probably a little bit more needed for soil. See my most recent post in my journal for more details
maybe try 1/4 cup, dissolve in warm water just till you get enough run off to test. I always try and use 6.0pH for runoff testing because that is what i am aiming for, though water pH has very little impact on soil/medium pH from my testing.
What the hell, a quarter cup?! =
you will kill the already sick plant doing this, sorry but that is absolutely bad advise mate... MoG is right, that's an insane amount of epsom salt, well beyond toxicity levels, and also
why would you use epsoms to shift pH?!
There are products are made to alter pH up or down, with less unwanted ion loading for this very reason. [H+] for when pH is too high, hydroxide [OH-] when too acidic. Clearly you don't understand basic acid-base chemistry, nor the antagonistic uptake issues created when you bombard the media with too much ion load....
Meters have a limited range which they are designed to measure... that load exceeds the meters capacity for sure, so what reading you get is gibberish. BTW one look at that coco tells me it's way to dry for a proper measurement in the first place, and so far as I know such a meter is for liquids only...
Coco needs larger amounts of Ca to deal with it's peculiar CEC properties, Mg to a much lesser extent... it requires a (not pH) type of buffering to load up the particles and achieve a saturation level that allows ready binding and release exchange in order for the Ca to kept available for uptake. Good quality brands have this done already, or at least partly; many redo it just to cover their butts anyway.... Bury it in excess Mg and SO4 and you'll have instant shit-show problems, to say nothing of the Sulfate anion issues!
It's the nutrient solution's job to keep all nutes in supply... Coco is basically a hydroponic medium, hence the "soilless" classification; run properly it involves large amounts of nute soln. going in and more importantly,
out...20+% run off every time, to purge unused nutes out, replenish what was and keep the ion load and pH in proper range.... Besides, we don't know what medium Whatta is using yet, which will be a key factor in fixing this mess....
Sick Bay here is a place for people to come and get safe, sound advise from experienced growers... nobody get's hacked on for grow mistakes here, I should know after doing this for 7 years before taking a break... But we can't tolerate guesswork and outright bad advise, however well meaning it is...
Hi guys,
My plants have been looking like this for a while. I’m giving them 53ml/10L terra flores, 25ml/10L cannazym, 30ml/10L cannaboozt, 3,75ml/10L rhizotonic. pH is now 6,5. Had some problems with pH before it was to low for some time. Should i harvest now before they get worse or what do you guys think i can do?
....hey bud, ignore the epsom advise about for gawds sake, OK?
Meantime, we need more info about this grow... There's a patient info form in the Sticky section above this one, just c/p it into here and fill in please,...
I see a host of issues here, and to untangle it we need pertinent info!