Have been given a piece of growing japanese green mustard root (Wasabi).
its a bit like a tiny brownish green carrot, with hair roots at the lower
end and a few small green leaves at the top end.

At the moment its in the garden pond. Is that the best place for it? If
left to its own devices it just sinks, so should I wire it to the pond side
so that the green leaves are above the water and in the air? Also will the
resident goldfish eat any part of it? thanks for any advice.