Leaves curling up

Ok, not sure what I did wrong here but plants were fine. I changed the reservoir just for the heck of it and now my plants are curling. Aeroponic. I added Mag Cal this time. Tap water was at 75 ppm added to about 200ppm then GH until like 700ppm, previously I was at 450ppm. What is wrong with my babies? lol
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Any ideas anyone?

looks like you burned it from the nute solution being too strong. you should still be on 1/4 strength nutes til it recovers. about 400 ppm should be about right

ok, thanks wiseguy!

Mold or Phosphorus deficiency via a nutrient toxicity or pH swing. Dial the nutrients in, those leaves don't even matter down the road.