Is this early signs of an issue?

[lunarman]

:smoking: Lunar, what's up?

...so, this is on the upper leaves, you say,... that hints at an early immobile nute defc. starting most likely,.. hard to say just yet which one, it's not definitive enough in symptoms.... You're using OverGrow too I assume,... it has some micronutes, but not the full spectrum from what I read, so I'm thinking something more 'exotic" like Mn, B, Mo,..forget if Zn is in OG or not,..? On occasion, Ca defc, can start up higher too, it's poorly mobile, and under LED's, issue can be more pronounced,... But with the OG foliar, it's hard to believe ca defc. is hitting,.. I do see some fine spotting typical of it though,... .........Mg defc. will hit lowers first and worst, pretty consistent with that,.. it's very mobile within the plant, readily translocated,... No N issues here at all!
... are you doing the 15-20% run-off each time with the coco? Checking the EC/ppm of run-off? You're familiar with the do's and don't's of coco, I forget,... if not, a salt build-up problem could be the cause, an/or off pH,.. nevermind what AN says about self-buffering, that's in low ppm water (which you have) and while in solution only,.. once in the pot, all bets are off, too many other influencing factors in play! Either way, an in-pot pH check would be wise,... point here is to see if you have a lockout/uptake blocking issue, of simple lack-of defc.,....

Wish there was a probe that had a digital readout that told you what chemicals and minerals are in the soil and how much. And add to my wish list a lockout yes/no indicator too.

Or some sort of star trek device you put a leaf in to and it will tell you what is what.

The lead dude from autopots is supposed to call me all the way from the UK to discuss coco, salt build up and the bottom feeding of autopots. since the ideal probe I want doesn't exist, I'll talk to my friend from autopots instead! Thanks for chiming in. And I'll be sure to update this thread later.

 

[lunarman]

Update time. I talked to support at AN and without looking at pictures even though I offered to send them, the guy said I need to up my nutes. Said the yellow blotches are nute def.

I emailed autopots in the UK and the head honcho Jason and he wanted pictures and details. I emailed him because I was wondering if the autopots bottom feeding and coco were causing me issues and wanted to know if there are any tricks and tweaks I can try out. He said it was very slight nute toxicity. And he asked me to drain my res and load it up with PH'd water 5.5 and feed water only for a week. So that is what I did. On day 2 of water only now.

 

[Troy01]

Anxious to see the results after a couple days.

 

[lunarman]

Its been 48 hours of being on PH 5.6 water only. I see nothing getting any worse which is great news. She is on the autopot res with the water and wicking all on her own. I have sprayed epsom salt foliar and an optic foliar overgrow mix. The few leaves that were showing issues look to be stable. The rust color is getting darker now. But nothing is getting bigger. I"m going to try and leave it on water only for 3 more days as suggested by autopots.
She is 18 inches tall. Day 34. She was slowed down by an LST gone wrong and a couple of branches I had to tape but she seems to be fine. Just slowed down a bit. Maybe in a good way in that I won't get a big stretch.

 

[Troy01]

Looks like you are moving in the right directions. Her new growth really looks lush.

 

[Waira]

...I wouldn't wait a full week for an auto,... but from her reaction, I'd say he was onto something- ... if she was nute defc., the symptoms would have progressed, so either it was becoming a bit too rich in there, or the pH was off enough in-pot to start pinching out certain nute elements,...