Efficiently Lower Water Temperature with Dymax Vortex Cooling Fan W-5 (Black) The Dymax Vortex Cooling Fan is a highly effective way to reduce the water temperature in aquariums, particularly in warmer months. Its built-in clamp allows for easy attachment to most aquarium edges, while the fan's airflow helps lower the temperature through evaporative cooling. With its flexible arm, you can easily adjust the airflow for optimal performance. Available in W-5 and W-8 sizes. Highlights: - Prevent overheating in your aquarium - Hang-on design - Utilizes vortex technology - Compact and quiet operation - Can be connected to an aquarium thermometer for automated control - Easy installation Technical Specifications for W-5: