Saim Glowing Effect Artificial Coral for Fish Tank Decorative Aquarium Ornament Artificial Aquarium coral offers a virtual sea world for your fish tank Safe for fish and good for fresh or salt water environments Suitable for any aquarium and easy for daily washing Total size : 9.6cm/3.8" base width, 16.51cm/6.5" Inch height Notice: The Glowing Effect will only happen under aquarium actinic lighting(blue light is recommended)