leaves curls up

Leaves curling up is often a sign of light and heat stress ? has it got abit hoit in there recenlty ? when they curl up like that its usually light stress i beleive they curl up and if left will create likea tunnel lol the discolouration of the leaves I would either put down to an slight imbalance in your feed or pH fluctuations I can see the stems of leaves are starting to turn red this would inidicate the plant is under intesnse light as the plants natural reaction to intense light is to pigment that section to deal with the stress and better distribute the heat you will notice this yourself when only the leaf stems that are in direct contact with the light are the ones that turn colour. just dim your light down abit if you can if not hang it even higher this should clear up in a few days :) 👊