Dual Drive Bubble Generator: Not only does the volcano decoration in our aquarium have the effect of "underwater volcanic eruption", the bubble generator with built-in LED lights will slowly switch to multi-color, making your aquarium clear at a glance. Use these exciting and unique aquarium decorations to enhance the beauty of your aquarium. More vitality: The aquarium bubbler encourages the fish to breathe oxygen through bubbles and encourages the fish to breathe to love swimming around him. The aquarium bubbler adds fresh oxygen to the water, which is so healthy for fish. Designed to add circulating oxygen and nutrients to your hydroponic growing system. Fish Friendly: The is made of resin, which is safe, non-toxic, eco-friendly and completely harmless to your fish . Bubble machine: Built-in aquarium air stone can dissolve more air in water, produce tiny bubbles to replace oxygen, and provide oxygen for breathing fish.