distorted growth

I need some help identifying what the problem is with my 4 plants, the new shoots are distorted and I can see the new shoots are small and the new growth doesn't look right . All in 5 litre fabric pots in pure Canna coco. I was feeding 800 EC of Canna coco, 20 ml Rhyzotonic, 2.5ml per 10 L of a...