Yes, planting a container pond with one main species as a feature plant can be very effective.
- a vigorous variety can be controlled in a container pond.
- plants with a sharp root stock can be dangerous to the liner in a pond but they cannot puncture the solid material of a container pond
- you can use miniature or dwarf waterlilies as the feature plant in a container pond
- always add an oxygenating plant under the water surface