blotchy green and yellow with slight necrosis?? Help

whats up guys?
For starters im in coco fed with heavy 16 nutes, cal-mag @ 3 ml/gal, zyme,& silica with ro water
Ppms @ 450 and ph 5.8 there in veg about 4 weeks there in 5 gal pots
I really started to notice it when I put them under the hps light from mh

Any ideas Im stumped and this shit is stressing me the fuck out

purple stems..........is it purple pot? if not, that could be phos lock-out/def.

no its some wifi og, what can i add to my regimen for phosphorus any products you'd recommend?

for sure it has to be phosphorus?

i would flush with some sugar water, and observe. most likely there is P in your soil, but plant can't uptake, so don't add. P doesn't like cold, wet, or alkaline either.

Looks a little nuked.

scroglodyte said:

i would flush with some sugar water, and observe. most likely there is P in your soil, but plant can't uptake, so don't add. P doesn't like cold, wet, or alkaline either.

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I dont even think theres P in there im in coco

CanBud said:

Looks a little nuked.

Click to expand...

Yeah man Ive been foilar spraying with 4f and a couple hours Id make an attempt to "wash" the leaves by spraying with ro water,
which then I found out its the same thing as flushing my plants so they kept getting stripped of nutes &I did do a foilar with some light base nutes during lights on after like a jackass and caused some burn but now the blotchyness seems to be spreading throughout my grow...

I upped the ppms after a flush with Ro water and have been spraying verde from humboldt nutes but doesnt seem to be doing justice, I have one mom in my veg that looks nice and green same strain to its fuckin pathetic

sorry.....coco. i misread. not my forte. looks like P. however one works that out in coco.....

Similar looking to my soil grow a few weeks back, I flushed em with 7.0 tap water and left them alone for a week. It made a big difference and now they're growing again and Ive just started using 1/4 strength nutes with cal mag and liquid karma.....lost some foliage but theyre rockin again. Thats all I can suggest as I'm not familiar with coco at all.