Why are my ice plants doing this.

How big is ur stone? If it's big, say a 3in round stone, try getting another one, and maybe put them between the middle plant and the one's on the sides. or get thre stones going, one for each plant

High Kool..

I'm thinking that you say the only thing you changed was the nutes, maybe your cookin em.
I'm just starting some NL99 and if I go above 775/1.55 EC they get droopy and green..
they begin to dehydrate (lockout) bcuz the nute too strong &| ph to low and then they become more sensitive to light and heat.

OR.. no mention of ph either Kool. If you add nutes, ph goes down.. Check Ph first.
when I do mine to 2.0ec/1000ppm/.5 ph (most normal grows, not the NL99) goes from 6.6 to 4.8-9.. I need to use some phup to get back to 5.6 ish.

Maybe I missed your setup somewhere else, if I did, sorry.

And unless you 'broke them' in the scrog net b4 u took it down, I can't see how that would do anything to them..