After we put the bamboo in the stock tank it dramatically turned yellow (Laurrie says it was pulling its energy into root reformation), a few of the culms died, and then it greened up again. I hit it with fish emulsion last week and it responded by sending up new culms. We still had a bare section in the middle of the tank so Greg dug up the last of the in-ground bamboo and got it in the tank, after removing the dead stalks.
I've never known how two-gardener households landscape without killing each other. I *might* be able to do it if it involved more surprises like this. I think we need a second stock tank now, no?