Firstly, Make small changes and be patient.
The pictures look similar to a situation I have been in, due to pests or PH fluctuation, what is the soil ph? what are you PH'ing your water too? what type of water ie distilled or tap?
Update on Plant count, as well as current pictures A lot has changed
4x Blueberry Diesel
2x Lucifer’s Big Bud
2x Fantasmo (CBD)
3x Frozen Black Cherry
3x Gelato
2x Alien OG
2x Zombie Death Fuck
1x Pineapple Express
1x White Widow
1x Random Auto
For a total of 21
Pictures to follow.
We need to know the reason for chopping as Nope stated but as for general revegging, I have done it and it takes between 4 and 6 weeks to recover from the process and possibly longer. it does leave you with a large number of tops and a good root ball.
If your clones are from during flower you...