Efficient aquarium fan designed to help maintain a stable water temperature, supporting fish health in both freshwater and saltwater tanks. Key benefits - Keeps water temperature steady to reduce stress on fish and improve tank reliability. - Quiet operation and USB powered for convenient, noise-free use day or night. - Compact external design that fits discreetly around or beside most aquariums. What makes it stand out - High performance cooling with a compact, low-profile footprint. - Reliable temperature control suitable for home or office setups. - Versatile use for aquariums, breeding tanks, and decorative water features where consistent thermal regulation is critical. 2-3 practical use scenarios - In a home freshwater or saltwater aquarium to prevent temperature swings during hot days. - In a breeding tank to maintain stable conditions for healthy fry development. - In decorative or office water features where steady temperature helps maintain optimal conditions and appearance. Compatibility and specs - USB powered for easy power access from computers, power banks, or USB adapters. - Designed for quiet operation to minimize disruption in living or work spaces. - External compact construction for simple installation and space efficiency.