Curled, red/orange and dying leaves.

Serious issues on serious stressed plants. Ebb and flow setups using vinyl fence posts. Live rez using botanicare CNS 17, cal mag, pondzyme and cultures. Wasn't paying attention and had the clones on a 12/12 cycle. They started to bud and moved them back to 24. Plants were healthy on the move. Ph got wonky, was 7.4 when I first noticed issues. Started as orange-red around edges of leaves, then progressively yellow leaves and then dead leaves. Healthy leaves are curled badly. Watering every 3 hours on PH corrected 6.2 water. Its been 3 days and no improvement. Strains are harlequin and catatonic. Acdc in the background on the same rez and cycle is healthy, the yellow leaves on it are normal growth cycle. Not showing any of the same issues. Both plants with issues severely stunted growth. Same batch of clones that I kept in flowering cycle have tripled the size.

Seems like a mix of N def and mag def. I would have expected to see improvement by now though after correcting Ph.

vostok said:

Flush ...Flush and Circulate, ...clean those roots up
wait 2-3 days and repeat
on the 4th day continue but only at 33% nutes advised increasing 15% each week
it will delay harvest but you will get bud
but the best is you will KNOW what you are doing for your locale, on the next grow
Merry Christmas​

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What's the cause? Same gen of clones that went to flower is healthy. Some of the neighboring plants are in good shape. Not trying to take these to bud, need them back to veg to break down for next round of clones.

vostok said:

The serious clue here is the curling leaves, imo caused by
1: over rich nute solution, typical of too many strains in the one mix of rez?
2: root rot, look for brown, coffee colored roots, and stinky sock smell, gurgle Pythium?

So I'm gonna shoot for over rich solution otherwise the entire grow will be curling ..flush and report back in 2-3 days​

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The clones were pulled from DWC because of root issues. I moved them to ebb and flow to get more aeration. The vinyl tubes are full of hydroton. I can open them up and dump the medium to check root health. Other plants had same root issues but cleared up when moved to ebb and flow. I was not expecting it to carry over into the ebb setup.

I'll measure ppm when I get home.

770 ppm. I started with 110 ppm water and dechlorinated. Dont have RO system installed yet. Ph down to 6.2. I buffered again to drop to 5.8 or so. No sign of pyth in the rez but I pulled a spacer out and I'm not too keen on the aroma of the hydroton. Tempted to pull it apart wash and replace with fresh but don't want to f up the roots more.

Plant them in coco -- that's what I did this summer when i couldn't get rid of the Pythium in my dwc buckets -- it worked great -- granted, my plants didn't look as terrible as yours ( no offense) but they were lookin kind of funky -- just another option for you. Those look, literally, like everything is wrong with them -- everything -- and if you say the roots are fine, you're most likely just nutrient burning the shit out of them.

I cut the rez to 390 ppm should be about half strength. PH stable @6.12. I put an extra water cycle in so they are getting now then again in 1.5 hour then 3 hour after that. I can pick up coco tomorrow try switching out the medium and check root quality then too. Weird thing is its just the harlequin and catatonic struggling. The acdc and snow goddess are fine. All 4 on same rez. All 4 came from same cloners.