Help Please @ 10wks

4 girls still on 12/12 just about to switch and i added sum ph down since they were in the 7+ range. Now they are all shriveled up with light yellow al over the leaves, the fan leaves are like dried out almost. I flushed them twice and then gave them a dose of ph up but after 24hrs it didnt help much. They are still in 6" pots should i transplant them into different soil like FFOF? I think this is what ya all call nute lock.
Any ideas please? what to do? Iv flushed them 2times with water. They are blueberry & blaze and they were so frign healthy lookn till now. Please help Thanks

if you are still on 12/12 what are you going to switch to?? did you mean 18/6 or somthing??

Yes i was about to switch their lighting.

please help you all got me this far..

Transplant and drench with the original water that you used up until the ph catastraphy.

Let them dry all the way out and then drench again.
No nutes for a week or so until they start looking better.

Thanks..I was also told not to transplant due to the stress but i think i will take your advise and transplant and flush It makes sense changing the soil since i messed it up so much. Thanks again

If you are in soil and only using 6" pots you maybe root bound .