Adding a SubstrateSource Banana Plant (Nymphoides aquatica) to your freshwater aquarium helps create a natural look for your tank. As it grows, this plant helps purify your water by absorbing nitrate nutrients. The "bananas," usually about an inch long, are actually modified roots that help the plant store nutrients. In shallow environments, this plant sometimes sends up "lily pad" shaped, floating leaves. Every banana plant is unique. Happy planting! NOTE: Never release plant species into the wild. Before discarding excess growth, allow the plants to fully dry. Photo depicts sample plant, not the actual plant you will receive. Some discoloration may occur during shipping due to the absence of light during transit.