Can someone please advise me why my plant leaf are...

It looks like a few possible issues her roots are a bit wet or she is in a state of transplant shock from going from soil to coco or your lights are too close .The red stems and pale color leaves are a sign of nitrogen deficiency possibly others. She just isn't taking enough up through her roots. I don't see any perlite in your mix. you need to have about 25-30% perlite in your mix to allow for a free draining mix. Also you should lower your ph to 5.8-6.3 they are better able to absorb nutrients at that ph range. I would also raise the light up slightly to eliminate the possibility of light stress the indication is the canoe shape of the upper leaves. I would let her dry out a little bit before your next watering you don't need to water the entire pot her roots are still small. maybe an area about 6" around the plant. I would also suggest that you may need to increase your nutes a little bit raise it slowly go by your brands feeding schedule which should be available on their web site to give you a better idea. She should green up after she gets more nitrogen. Good luck hope this helps I'll follow along.