Effective Cooling: with our aquarium fan, you can lower the water temperature and prevent overheating. No more worrying about high temperatures or health problems that can harm your fish. Let your fish have a cool and comfortable summer with our aquarium fan. Durable and Sturdy Fan:This aquarium cooling fan is made of high quality ABS, lightweight and durable. It can be used for a long time without fading or breaking easily. Oxygen Optimization: it improves the oxygen in your aquarium. Therefore, this aquarium fan has a low-noise function that creates a quiet atmosphere. A USB interface provides simple power supply. Easy installation: this fan cooling device can lower the temperature of water, which is suitable for aquarium walls up to 10mm. It is easy to install and attach to the aquarium wall with screws, adopting clip design for convenience and stability. Widely Used: this fan lowers the water temperature of your aquarium, whether it is fresh water or sea water. It can also create a cozy and refreshing environment for your cat, hamster, reptile or dog. Thanks to this fan, they will appreciate their home more.