Adding a SubstrateSource Lace Java Fern (Microsorum pteropus var. windelov) 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. Our Java Fern can be grown with moderate light fully submersed under water. For optimal growth, tie the plant to wood or rocks. 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.