Compact performance aquarium cooling fan for freshwater and saltwater tanks Spacesaving vertical design: the vertical, compact external construction helps you fit the cooler into tight setups while helping to prevent overheating in warm climates. Reliable temperature control: designed for enthusiasts who need stable temperature management for both freshwater and saltwater tanks in home or office environments. Quiet operation with USB power: lownoise cooling powered via USB for convenient, dayandnight use without disturbing occupants or workspace. Efficient cooling for fish health: performance fan maintains stable water temperature and environmental conditions to support fish health and tank stability.Key attributes Function: aquarium cooling fan that actively lowers and stabilizes water temperature Compatibility: suitable for freshwater and saltwater tanks Design and size: compact external housing with a spacesaving vertical profile Power: USB powered for easy connection to common devices and power banks Performance: aims to maintain consistent temperature and environmental stability in the tankUse scenarios Home freshwater tank in a living room or bedroom where ambient heat can raise water temperature Office or classroom saltwater or mixed tanks where space is limited and quiet operation is important Desktop or small display tanks that require unobtrusive cooling without heavy equipment or loud fans