niceEshop Glowing Artificial Soft Sea Anemone Coral Plant for Aquarium Decoration Perfect collection stands 3.9 inch tall, suitable for small tank. If you have larger tank, 2 pieces or more will recommend. Material: silicone. The tentacles will soft moves around slightly with water flow, which will create Stunning Natural environment for your adorable fish Wonderful glowing effect will shows under actinic lighting, blue or white light is recommended. Adapt to both fresh and salt water, durable, fade-resistant, no-toxic and easy for daily washing Note: The stronger of the light, the better glowing effect will show. The principle of glowing is the phosphors, which can absorb the Light energy and save it and then glowing when at dark. So the stronger of the light, the stronger glowing will be.