Nuphar lutea or Yellow Water Lily is a marginal or shallow water aquatic pond or water gardening plant.
Nuphar lutea commonly known as, Yellow Water Lily is a marginal aquatic or pond plant. Use this type of plant to decorate shallow (about 6 inches deep) pond areas. The Yellow Water Lily will grow well in all areas. It flowers in summer. The flower colour is yellow. This aquatic or water gardening plant grows to surface. Does best in water depth: 1 to 3 feet
Great article about oxygenators
List of floating plants for garden ponds
List of marginal aquatic plants for ponds and water gardens
Other aquatic plant links
Carex Paniculata or Greater Tussock - Sedge is a bog or pond-side aquatic plant.
If You Want to Buy Water Gardening Plants Online