A raised pond Make it at least 3 feet deep to keep Raccoon's out and give the fish hiding places. Put an upside down plastic milk crate with extra wide openings on 2 sides Top it with a rock or potted plant.
Carex elata 'Aurea' 'Aurea' is a vigorous, long-lasting sedge, with vivid yellow-green foliage. Allow to reach its required size and divide when necessary. If kept in a small pond, it will probably need to be divided every two years.