Goldfish swimming above the pond? Nothing koi about it.
If you want your koi or goldfish to enjoy their stay in the pond, better install the Flying Aquarium Fish Observatory. This unique acrylic glass aquarium “floats” on top of the pond and allows the fish to get inside and see what things look like above the surface of the water, which means they get to observe our world as much as we can observe theirs. It comes with an HBCD free floating body in choices of red and grey colors.