Its clearly not happy, what are the day & night temperatures?
If it was me, Id pull it out, wash the roots clean with a mix of canna rhizotonic, ph it to 6.0, let the roots soak for a couple of hours in some clean rhizotonic then I would transplant it into some high quality coco coir like canna coco & feed it 5ml of canna coco nutrient mixed to .6ec ph 6.0 each morning & within a month it will look fantastic.
billyboy
If it was me, Id pull it out, wash the roots clean with a mix of canna rhizotonic, ph it to 6.0, let the roots soak for a couple of hours in some clean rhizotonic then I would transplant it into some high quality coco coir like canna coco & feed it 5ml of canna coco nutrient mixed to .6ec ph 6.0 each morning & within a month it will look fantastic.
billyboy