Two major functions: There are water bubbles and decorations. Save time and money. If you want a foaming effect, You can connect the air hose and the air pump little fish house: It has 6 caves where your love fish can hide and create a natural and happy atmosphere for your fishes Safe and Non-Toxic: The aquarium decoration is made of polyester resin, which is safe and BPA-free and is not harmful to your fish and aquariums. Feel free to use it Widely Used:Because the aquarium decoration is made of polyester resin, it has high saltwater resistance, so you can use it in both freshwater and saltwater aquariums< /p> Suitable for aquariums: 7x 7x 16 cm, suitable for small to medium sized aquariums. Make your aquarium more beautiful Number of items �1