Leaves curling up and color changing, is that normal?

First she looks a little overwatered. Let her dry out some then feed with a pH of 6 check pH of runoff it's probably around 7. That's why she is not absorbing calmag, boron, manganes, copper etc... Those minerals are there in the substrate, she just can't use them with the pH out of range, so just feed water ph@6.0, then she will get healthy quick just in time for a decision on final flush or one more feeding. Haha, good luck, ok all that is my personal opinion and backed up by nohin but nothin.

Are in flush yet buddy because if you are it totally normal at the end the plant will suck all the nutrients out the plant leafs to feed the last growth as you should be just giving water other wise can be a ph problem if you not started to flush the plants get lock out of nutrients some think like big bud or the nutrients brand you use will have some think similar happy growing buddy best of luck 😁👌👍😎