Would really like to see a number where it says I don’t know. Catch a couple of cups of the water that comes out of the bag, see what the ppm reading is. That or a slurry test.
For a slurry test, get a cup of your medium, a cup of distilled, mix them real good, then let the soil settle. This will give you a pretty solid measurement of your ppm’s also.
Add/edit. Strain the soil after mixing in the slurry test so you don’t end up with a gunked up meter.
Good catch. I totally skimmed over the giant yellow meter in the last pic.
Sort of, I made sure it recognized changes in pH by taking a reading in fresh unaltered soil and then again after adding a teaspoon of pH down (I know that’s a lot). The meter responded then and again when I added pH up, so I know it works, how well I don’t know that.
I tried a hydro setup last year and picked up a pH meter and a separate ECM/TDS meter but I, embarrassingly, do not know how to use those for the soil so I retreated to my probe.
Paging @Lostgirl please come to the nearest green phone at your earliest convenience.
Shes with another patient right now… 
@Zampano just tried to call you. “Your call has been forwarded to voicemail” 
I’m assuming that’s what you wanted?
A very wise man once told me. “If you want to grow cannabis there are two items that you do not go cheap on or you will be very sorry”
1.) PPM and pH metering devices
2.) the lighting for your tent
There has been no truer words spoken in our field.
@SmittyJ this would be my recommendation as well. Input and medium PH are typically the culprit 90% of the time. Most cannabis friendly soils will buffer the PH to a range of 6.3-6.8 but an excess of salt from synthetic fertilizer can tank the PH and drive up the PPMs. I definitely recommend liberal run off using the FF nutrients 
Thanks OG
@SmittyJ good to see ya back in the game! Sorry you are having an issue, but these guys have you covered. Looking forward to seeing you work through it and having a great harvest!
Yes Sir, thanks for commenting and its very good to hear from you as well. I have three clones standing by in veg so the help that everyone has lent me in this thread will definitely improve my results with those three gals.
Every other day is a lot in soil! You should lift pots and only water when light, too much water in soil will cause what you have! Usually takes 3 days between watering…… that’s when they are drinking good.
Man we haven’t had a decent signal in DAYS out here…
Was tagging you for this thread.
Look at all the growbros and growsis answering the bat signal for help. 
Everyone heres got you covered @SmittyJ
She is getting sticky and stanky! Thanks for the help everyone, my girl has recovered and is really packing on the trichs. Most of the leaves that were affected have died off but some are hanging in there with their ugly spots and crinkled up tips haha.
My pH is still off, I have been adding pH up to my water but not overly aggressively. I added enough to get the water pH to 10.00 and have only watered twice since the post. My pH today reads 6.2 so it has come up about 0.4 points.
None of the trichs are ready of course, they are clear spheres so I will keep on keeping on.
OneJollyRancher out 
Howdy Growmie. Are you doing this 
in an effort to drive your low pH up? I may have a word of caution that may apply. I use different nutes but the same mediums, FFHF & FFOF but with the opposite pH issue, soil pH is high. Attempted to drive it down with lower pH (5.8 - 6.0) and it lowered the soil pH only a little but started causing more problems, nute uptake on the low end of the scale started being affected. You’re best off to re-adjust your soil pH when you flush, imo.
Also, the year I started growing, I was having a deficiency problem very similar to what you have here. I say similar cause I’m not proficient in nute def/toxicity identification, I thought it was a calcium def. I read someone posted in this forum that If you have a calcium def in flower, you can’t make up for it. Have never verified this but since then, I give mine a little cal/mag with every watering and feeding. Doing that and always going in with pH’d liquid in the soil range (6.3 - 6.8) = I no longer see the spots appear. Happy harvesting.
BTW, nice looking forest out of a single plant. 
I’ll get back to this when I’m off work.
I only use fox farm nutes.
