Hygger Adjustable Cooling Fan Hang-On Filter Media Add slowly to the sump

Add slowly to the sump or a high-flow area away from livestock

Sensor holder

Hard wood resists rotting compared with softer driftwood

and more uniform end-to-end coverage

Good for reef aquariums where fixture spacing and positioning are important for even coverage

Hygger Adjustable Cooling Fan Hang-On Filter Media Add slowly to the sumpHygger Adjustable Cooling Fan The Hygger Adjustable Cooling Fan is a compact aquarium cooling fan for helping lower water temperature through surface evaporation. It is designed for freshwater and saltwater aquariums where warm room temperatures, lighting, pumps, or seasonal heat can push the aquarium above the desired range. Hygger Adjustable Cooling Fan Overview This fan uses a 7 wing fan wheel, adjustable fan head, external controller, and multiple