Adds beneficial bubbles to the aquarium water, help circulate the water and improve the living conditions for your fish Easy to set up, enhance the aesthetic appeal of your aquarium with this exciting and unique aquarium decoration Multi-colored LEDs light changing colors slowly, make a wonderful view of your aquarium It fits for most aquariums,fish tanks, pools and other similar occasions Each kit contains one decoration, bubble maker with build-in LED light, tube and power adapter, pump is NOT included