Auto Glueberry OG infirmary

[Z_Burp]

...OK, the meter needs more frequent calibration, maybe it's still close, maybe not,... One thing that messes with them is not storing it in the right solution, but not all call for it,.. see if yours does; drying out can knock it out of calibration too,... I'm dubious about the probe, but perhaps that dual probe unit is better than the single probe skinny types I've tested next to the A8 unit... that probe is worth it's weight in gold, so consider scoring one! You've been solid for pH'ing inputs, so that goes a long way to keeping the soil pH in line.
... So, no regular nutes at all not grow, or bloom,.. the problem is OS and BB are supplementary bloom boosters, and not nutritionally complete, and I don't like the ammonium N, this tend to make them very acidic, which during uptake by the roots, also adds acidity... Often there can be more subtle deficiencies, but not show it by outward symptoms... sometimes they show indirectly by other nute defc.'s... several are involved with the metabolizing with others,... You're getting close to wind down here, but I'd still consider getting a dedicated primary bloom nute, and/or a micronute supplement,.. raise the Ca-Mg to full dose conc.; these girls have so nice size, and are really sucking upo the PK, so meantime, you can blend the OS and BB together to get better nute element coverage (OS has S in it very important for terpene building!) and since it's over a gal of water total, try upping it to 1/3-1/2 tsp total,... Let's see if the elevate PK and Ca-mg stop symptom progression after a few days,...

Done and done.

Recalibrating pH pen...
Ordering Accurate 8 next paycheck
Possibly picking up a decent pH probe
Upping BB and OS to 1/2 tsp/gal total (I also have Cha Ching, but I imagine that's just a supplement and also not complete nutrition)
Cal-mag label says 1 ml/L for general use (general hydroponics CALiMAGic). Should I try 2 ml/L?

I'm definitely going to be looking into my nutrition instead of just supplementing.

Will update...


(edits below)

3/18/17 frack me! pH pen was off by 0.6! Who knows how long it's been saying 6.5 when it meant ~5.9! This also means my soil probe is off!

3/19/17 Runoff is now 5.1-5.4 pH when watered with 6.5 pH, so I've got some pretty acidic soil from , or all that time I was watering/feeding in the high 5 pH's.

 

[Heavily Medicated]

Done and done.

Recalibrating pH pen
Ordering Accurate 8 next paycheck
Possibly picking up a decent pH probe
Upping BB and OS to 1/2 tsp/gal total (I also have Cha Ching, but I imagine that's just a supplement and also not complete nutrition)
Cal-mag label says 1 ml/L for general use (general hydroponics CALiMAGic). Should I try 2 ml/L?

I'm definitely going to be looking into my nutrition instead of just supplementing.

Will update...

I use CaliMagic, I give seedlings 1 ml/L, veg 2 ml/L and during flowering I have had to run as high as 3 ml/L to hold back a Ca/Mg hungry beast. I run LED and RO water both, so demand is high.

 

[Z_Burp]

I use CaliMagic, I give seedlings 1 ml/L, veg 2 ml/L and during flowering I have had to run as high as 3 ml/L to hold back a Ca/Mg hungry beast. I run LED and RO water both, so demand is high.

Thanks @Heavily Medicated!

Please see edited post above for updates...

 

[Waira]

..this is why I ask! The pH scale logarithmic, meaning a jump of 1.0 is actually a ten-fold increase/decrease, so even 1/10th's are quantitatively big... Between the soil and very acidic feeds, I think your soil pH is low enough to be locking out P,... despite some overlap in Ca and P defc. symptoms, these looked more P to me, but going by your earlier pH's, P lockout wasn't indicated,...
So, with this new info, DON'T up your feed, adding more of these will make matters worse! In fact, a flush might be in order-- first, have symptoms continued to advance? If not, or minimally so, maybe a flush can be avoided,... If it has advanced significantly, 2-3x the pot volume is recommended (I take measurements after 2x) ....What's the tap pH? I want to get an idea about it's hardness, as this involves the buffering mineral CaCO3,... Dechlorinate it, and likely, no pH adjusting,.. Speeding drainage is wise, after flush and well drained; in those air pots, this is more difficult. A big wad of paper towels or something soft and absorbant tucked under the pot making good contact with the base underside will start some capillary action pull, and set it all on newspaper to add further absorption from the towels,...
Those feeds, really aren't good as a primary source, they are part of a trio to be used in sequence as supplementary boosters,... If you can swing it, get some reg bloom nutes, with much lower P-K #'s,... no need to spend big $, and you need it anyway, even if this plant is nearly done,...

 

[Z_Burp]

..this is why I ask! The pH scale logarithmic, meaning a jump of 1.0 is actually a ten-fold increase/decrease, so even 1/10th's are quantitatively big... Between the soil and very acidic feeds, I think your soil pH is low enough to be locking out P,... despite some overlap in Ca and P defc. symptoms, these looked more P to me, but going by your earlier pH's, P lockout wasn't indicated,...
So, with this new info, DON'T up your feed, adding more of these will make matters worse! In fact, a flush might be in order-- first, have symptoms continued to advance? If not, or minimally so, maybe a flush can be avoided,... If it has advanced significantly, 2-3x the pot volume is recommended (I take measurements after 2x) ....What's the tap pH? I want to get an idea about it's hardness, as this involves the buffering mineral CaCO3,... Dechlorinate it, and likely, no pH adjusting,.. Speeding drainage is wise, after flush and well drained; in those air pots, this is more difficult. A big wad of paper towels or something soft and absorbant tucked under the pot making good contact with the base underside will start some capillary action pull, and set it all on newspaper to add further absorption from the towels,...
Those feeds, really aren't good as a primary source, they are part of a trio to be used in sequence as supplementary boosters,... If you can swing it, get some reg bloom nutes, with much lower P-K #'s,... no need to spend big $, and you need it anyway, even if this plant is nearly done,...

Symptoms have advanced.
Tap water pH is 6.6 with meter calibrated today.
I do have some Tiger Bloom (2-8-4) that I can use until I find a regular bloom nutrient.
I also have a dechlorinator I use for my fish when doing water changes. Might that work to quickly do the trick?

I did up the nutrients as suggested today. I will flush her right now.
Thanks immensely for all of your time!

 

[Z_Burp]

Ok, I ran 12 gallons of water through her (5.6 gal air pot). I also did my Ice Cool Auto since she showed signs of the same affliction.
I put towels and newspapers under each one to help pull out moisture and also turned the fan to my dehumidifier up.
So strange, two years growing with no pH meter and haven't seen any problems. Three months after I get a pH meter this happens. But, I've also never had plants this big...

 

[Noob420]

It's dual rod type soil probe that has an analog type dial on the front similar to the one below:

The pH meter is from Amazon and is rated as accuracy +/- 0.1, I rinse in distilled water after each use and put it back in it's case when I'm done:

I did a two point calibration two/three months ago using General Hydroponics 4.01 pH and 7.0 pH calibration solution. I recall I did it before I started my Ice Cool Auto and Auto Glueberry OG.
I use regular tap water that's been sitting out for 24+ hours before I use it to water. I also get the water pH to 6.5'ish before watering if there's no nutes in it and also after adding nutes. My tap water runs 7.8-8.1 pH out of the faucet. I don't have a TDS meter so I can't give you that info, sorry.

Last four weeks feeding schedule (watering between feedings with 6.5 pH as needed):
2/12/17 - 4 L water, 1 ml/L cal-mag, 1/4 tsp of OS, pH 6.4
2/19/17 - 4 L water, 1/4 tsp of BB, pH 6.3
2/26/17 - noticed the spotting here, but I think there was some I didn't see on the back side of the lady before I noticed - 4 L water, 1.5 ml/L cal-mag (thought it was cal-mag def) forgot to write down pH
3/5/17 - spotting worse, leaves browning/curling/dying - 4 L water, 2 ml/L cal-mag, pH 6.3
3/12/17 - PANIC, didn't write down a thing. I recall 2 ml/L cal mag...

She's scheduled to be finished around April 10, so I've got a little more than 3 weeks left on her.

Ask away, be brutal if you have to, this is important stuff!

Again, thank you very much for your help @Waira @Heavily Medicated

I have the same ph pen, and calibrate before each use because it can go outta wack at anytime. Sometimes within a couple uses the calibration changes. I also store mine in the calibration solution.
Hope this might help.

 

[Z_Burp]

I have the same ph pen, and calibrate before each use because it can go outta wack at anytime. Sometimes within a couple uses the calibration changes. I also store mine in the calibration solution.
Hope this might help.

You store it in the calibration solution? Node down up to the ridge line?
When I was thinking of buying a pH meter there were a lot that required storage in a solution ($100+, too). I got this one because it doesn't require that. Look what happened, though. Hah!
Does keeping it stored that way help it stay calibrated longer?

 

[Noob420]

You store it in the calibration solution? Node down up to the ridge line?
When I was thinking of buying a pH meter there were a lot that required storage in a solution ($100+, too). I got this one because it doesn't require that. Look what happened, though. Hah!
Does keeping it stored that way help it stay calibrated longer?

I think it does keep the meter calibrated for longer. I could just be paranoid and check it every single use because, sometimes it just changes for no reason.

 

[Z_Burp]

I think it does keep the meter calibrated for longer. I could just be paranoid and check it every single use because, sometimes it just changes for no reason.

I am now paranoid about it. [emoji43]