The colorful coral aquarium decoration make your aquarium looks vividly, add to natural color and a beautiful scenery. Also is an excellent hiding cave for fish to play, add more fun to their lives The coral aquarium are 4 holes on the rock fish decor, your lovely pet betta or other smaller fish would be super happy to go in and out the trunk cave to sleep, rest, hide, play, breed Our coral decor made of Eco-friendly silicone material, non-toxic and safe for freshwater and saltwater aquariums Solid one piece construction, it features aeration holes and swim-through chambers, provides a place for nitrifying photosynthetic bacteria to attach, make a healthy environment for your fish Coral Aquarium Decoration The colorful coral aquarium decoration make your aquarium looks vividly, add to natural color and a beautiful scenery. Also is an excellent hiding cave for fish to play, add more fun to their lives Creates a beautiful natural scenery in your aquarium Non-toxic resin material, safe for freshwater or saltwater Simple maintenance Easy to install, can sturdily stand on any aquarium surface Specifications Material : Resin Dimension: 13.5 x 13.5 x 16cm Weight: 376g Fish tank size: Medium and large size tank Note: As this product is made of resin,there may exist some lightly smell, please rinse and soak this product in cool water for 15-30 minutes before use,to clean and relax this smell,and give them an even more realistic look.As aquarium ornament is easy togrow alga,we recommend you to wash the ornament every weeks by running water. Just needs cool water to clean it, leave it dry and then put it back into your tank,in order to keep it in its best form and color is to avoid exposing it to high temperature environment and never use hot water for cleaning.