I removed all of mine from the 'bundle' and potted them up properly.

Have they grown bigger, Helen? I have a couple which have been
standing in water for over a year..they seem perfectly healthy, but have
hardly grown at all.

I haven't had them that long to see if they've grown. However, they are
still all healthy which is a lot better than the first lot I had. I left
these in the water, and most rotted away, despite regular water changes and
using soft bottled water. I find the cheap 12p a bottle Asda water is soft
... and therefore good for bamboo and my coffee machine ;-). Problem is, I
have to divert across town to get to Asda specially for the water. Buying a
trolley load of their water sometimes brings strange looks ;-)

Best,

- h