This is sort of a repost to this topic. I had a "bell" water fountin
in the pond besides the water fall via filter. Took the bell part off
to clean but it was still bubbling quite a good volume but under
water. Well the gold fish started swimming thru it getting flipped
around and just kept doing it. So I have left it that was, this is
the only TOY I have found other than chaseing chunks of watermellon
that they like.

Steve E.