Little help please

[shumway]

Wondering if i could get some help to diagnose wtf is going on here lol

Dinafem white cheese @ day 27 - Discoloring & blotchy patterns in leaves and new growth is thin and yellowish

Promix premium potting mix (peat/coir) no amendments

Advanced - sensi grow a&b @ 1.2ml - G.O CaMg+ @ 1ml - GP liquid w-8 @ 1ml

ph going in is between 6.3 - 6.4 but have no clue about runoff

 

[shumway]

Figured this one out by the looks of it lol

This new promix peat/coco mix needs to be treated like coco alone with ph levels around 5.8 - 6.0 so i was on the high end which started to eventually lead to defs

 

[Waira]

Shum! Your input pH's aren't the reason for this,...with this blend, around 6.0 is a happy medium, but low 6.2 shouldn't be an issue,.. but yes, somewhat elevated Ca-Mg demand is in play, due to coco's powerful binding affinity for Ca,.. it needs to be sated first or it hogs the Ca for itself... that said, the spots are kinda generic looking not distinct enough to call defc. related with certainty... how often do you feed, or do you add Ca-Mg even to water? ... the upper leaves are another matter,... looks like an early micronute defc. starting (Fe and/or Zn), or possibly S defc.,... Shum, you what I'm gonna ask now, right?! didn't you get an accurate 8 soil pH probe yet? I'm telling you, it's such a great tool for managing pH! ..tell you what, a rude, crude estimate can be had from water-only run-off collected in a clean saucer, no contaminants, crusty shit, etc.,.. get that for me, and we'll see if you're lock-out or just plain having a lack-off defc. issue,... I'm guessing the latter!

 

[shumway]

Can't afford no accurate 8 lol but did get some cheap handhelds and yes have been using CaMg+ with every feed lol

Screwed around and tested runoff the other day on my other plants with the same soil and even did a half assed slurry test on the soil alone with distilled water.

Slurry test came in @ 4.28 ph
Runoff test for plant [HASHTAG]#1[/HASHTAG] @ 4.93 (6.35 in)
Runoff test for plant [HASHTAG]#2[/HASHTAG] @ 4.83 (6.39 in)

Don't know what else to tell ya

 

[Waira]

- whoa! That's making no sense, and has me wondering about the pH meter's calibration; has it been done recently? By any measure, if the soil was really this acidic, the plant would be a smoking wreckage! ..let me know Shum, it's hard and risky for me to advise still,.. other than maybe feeds need to go up, simply by what the upper leaves defc. sumptoms are showing, and clearly, it's not an overly alkaline issue!

 

[shumway]

The meter was calibrated before hand and even rechecked it a couple times to make sure it was keeping its calibration

Maybe my water was screwing me up and causing lockout? Was using bubble tap set out for 24+ and theres no telling what the hell thats like since have no tds meter to check but everything is going away using pure distiled now lol

 

[Yeatster]

@Waira you recommend the accurate 8 soil ph tester every single time. I'm sure it's worth it's money in gold but, is there another brand you recommend, for the po' folks like me?
Sorry Shumway. I do feel this question pertains to your grow, so I wont say I'm highjacking.

 

[Waira]

... Yeats'-- unfortunately, there isn't that I've found,... the cheapo skinny probes you see at garden centers, etc. aren't worth a dime, much less the $12-15,...and on the other end, it's pro models that are $150++,... these work more like a pH meter, really meant to be used in slurry tests; their probes are pretty big too, not meant for shoving into the soil, and scooping out enough soil would fuck up too many roots,... the A8 really is the best tool for the job,...about $55 new. When you consider what all the fix-it products cost, the amount of time and effort wasted fighting off-pH mediums, and the loss of yield, it's going to pay for itself pretty quickly,... I totally get that budgets are budgets, I'm just making a case for why prevention is less expensive than cure! You might even find a used one on e-bay that some dipshit couldn't figure out how to use, and claims it's broken or junk- seriously, I see these imbeciles using to to test liquids, or never clean the tip, don't give it time to stabilize and read accurately,... proof that many pinheads don't bother reading instructions, or understand how these units work,...

>> Shum, I trust the slurry test most, the r-o tests are crazy,.. doing the calculations, the pH would be in the 3's! The plants would be long gone, preceded by a host of defc. issues,... well, in any case, the pH is acidic, not alkaline, so lock-out of Fe/Zn are out, and S is too, just not the right symptoms that I see,... has there been cool conditions, like below 65F? Cold temps can slow transport of some nutes down enough to cause temporary defc. symptoms, Fe/Zn included,... could be this is just a lack-of deal, in which case, you need to up the feeds, or better still, pick up a micronutrient supplement; Earth Juice Microblast is my fav', about $10-12,...
What's the pH of your tap water? that can give a clue to hardness,... and if the soil is too acidic, this would be better, for the buffering minerals in it, which are gone in Di water,... you say the symptoms are fading now, using the Di water?

 

[shumway]

>> Shum, I trust the slurry test most, the r-o tests are crazy,.. doing the calculations, the pH would be in the 3's! The plants would be long gone, preceded by a host of defc. issues,... well, in any case, the pH is acidic, not alkaline, so lock-out of Fe/Zn are out, and S is too, just not the right symptoms that I see,... has there been cool conditions, like below 65F? Cold temps can slow transport of some nutes down enough to cause temporary defc. symptoms, Fe/Zn included,... could be this is just a lack-of deal, in which case, you need to up the feeds, or better still, pick up a micronutrient supplement; Earth Juice Microblast is my fav', about $10-12,...
What's the pH of your tap water? that can give a clue to hardness,... and if the soil is too acidic, this would be better, for the buffering minerals in it, which are gone in Di water,... you say the symptoms are fading now, using the Di water?

No cool nights and this was starting while they were still in my other cab which always ran hotter.

Out of the tap the ph is 8.2 as lots of older homes here still have lead pipes so city raised her up high to help stop leaching of the pipes,And yes everything was 75% going away using the all same nutes but using the distilled water.

Can't raise the sensi any more,Not even @ 1/2 strength for 31 days and been burning tips and getting the claw but did up the CaMg+ to 2ml now

Last feed was 1.2ml sensi - 2ml CaMg+ - 1ml B52 - 1ml liquid w8 - 0.5ml pro-silicate