lucky bamboo problem

[greasyfire]

Hi guys i am growing lucky bamboo, those things in the shop that are bought in all shapes and sizes. I have brought the bamboo into my bathroom which most of the time is humid. However one of the bamboo stem has hollowed out with some kind of scale on it. i have taken a cutting of the shoots and put it in water while the neighbouring bamboo is also developing it. Does anyone know what this is and how to prevent and cure it also does anyone know can you grow lucky bamboo from cuttings.

[Tam]

This is quite a useful article : Lucky Bamboo Quick Care Tips