Lockout? Deficiency? Fan Leaf problems

I know this is a hard question since problem could be deficiency or lockout...

Im using promix hp and NFTGods nutes with LED setup.

Temp and humidity in range.

did slurry test (but as n00b I did it after ladies were in the mix as I had never heard of a slurry test) later on the pmix bag and got around 200 ppm and 5.5 Ph. since plants already in the "soil" all I could do is try to use the nute line to raise Ph

From what I understand Using the nutes at around 6.4 pH should balance the "soil" eventually??

So the symptoms on a couple plants are yellow/brown on margins (started as tiny spots and went from there) starting low and going up as well as spreading to more of the leave(s)





Also, on a few plants I also have dark green fan leaves that twisted a little bit (see pic). Not crazy twisting but just a bit. more interested in dark green color- natural since parents are Indicas.



I also noted that all plants have red stem on fan leaves.

Anyway, any input much appreciated!

You're on the right track. Adjust your pH to no more than 6.5. Add a bit of molasses occasionally to feed the mycchoriza. If cal mag is not in your nutes you should add from the start. Better root development.

Red stem, if phosphorus deficiency, should go away with the mycchoriza. That's the major element they help transport. I add additional probiotics through the grow. Great White rocks but it's high dollar . I use Xtreme Gardening Mykos.

Last read about leaf septoria. Your light keeps us from seeing the color etc. But read about this and other blights or fungal like fusarium.

Yeah I already used mykos in 1st transplant. Know its supposed to expand root system and the finer ones.

Late here but will shoot pics in a.m.



Oh btw, how do you get your soilless media from 5.5 to 6.5? my nutes have ph up but how to add? not sure if it needs a big jump or that feeding the nutes at 6.4 will -eventually- ?? get soil in the right range.

Thanks!

Got some non-sepia pics of my problem:



Here's another:





So, yeah, brown spots on the margins turning to yellow from bottom to top of plant. To my unexperienced eyes it looks like a Phosphorous deficiency but since im using a peat based soilless media (pmix hp) I think the P is being locked out. pmix was testing at 5.5 out of the bag - I think, since my bluelab pen, unless very watery, wont test out slurry very well. Wish they had a hallway good (and cheap) soil meter but im hoping with raising pH of media, somehow (via ph up liquid limestone NFTG) I'll sleep more soundly I thought I had a green thumb all these years; not easy to grow indoors, at first at least, im sure

so keep on using the nftg line, pH it at recommended 6.4 and soil will fall into range? ive been feeding them, lightly, for the past couple weeks but the P lockout persists (if that is what the problem is).

Anyway, tyvm!

Sorry they are right side up on my phone and pc before tinypic got thru with it lol