Representative photo. The product you buy may differ in size, colour or packaging.
Cooling fan
heater
Used for: Tank maintenance
Specifications
| Specification | LONDAFISH Aquarium Chillers Aquarium Fan Fish Tank Cooling Fan | DaToo Aquarium Chiller Fish Tank Fan Aquarium Cooling Fan |
|---|---|---|
| Tank size | 2 fans for a 40 cm tank | not listed |
| Control | Two speeds | Two speeds |
Values as listed by each source when checked on 2026-09-17. Listings change.
Description
An aquarium cooling fan clamps to the edge of the tank, and the cooling figures below are the sellers' own. LONDAFISH sells its fan as a set of two. It fits a tank rim up to 12 mm thick, runs at 12 V from a DC power adapter and has two wind speeds. LONDAFISH suggests two fans for a 40 cm tank and says that, according to the indoor temperature, they can lower the water temperature by up to 2 to 3 °C. Its description credits the effect to ventilation that reduces heat transference from aquarium equipment. DaToo's fan also comes as two fans, with an engineering grade ABS fan on an aluminum alloy clip that fixes to the edge of the aquarium. The listing gives a 12 V DC output, two wind speeds, a fan speed of 3500 RPM, an airflow of 55 CFM and a rim thickness of up to 12 mm, and the wind can be aimed by changing the angle between fan and clip. DaToo says the fan speeds up heat dissipation and gives 4 to 6 °F of cooling, and that it runs 10 to 12 dB quieter than similar products. Those are the seller's figures. AQUASMITH's listing says the fan uses evaporative cooling and concentrates airflow onto the water surface, and its answers to buyers say the performance of this evaporative cooling fan depends on tank capacity and ambient temperature. The US Geological Survey explains the physics in general terms, not for aquariums: breaking the bonds that hold water molecules together takes energy, so evaporation removes heat from its surroundings and leaves a net cooling. AQUASMITH also warns that its fan is not waterproof and should not be submerged or exposed to excessive moisture. Why warm water is a problem, starting with the oxygen it holds, is covered on our aquarium chiller page.
Sources
- amazon.com — https://www.amazon.com/dp/B07FCJGZ4H
- amazon.com — https://www.amazon.com/dp/B085LM313D
- amazon.com — https://www.amazon.com/dp/B0F83J7J9J
- usgs.gov — https://www.usgs.gov/special-topics/water-science-school/science/evaporation-and-water-cycle
Figures on this page were read off these pages. Manufacturers and databases do change or retire pages; if a link is dead, tell us with the correction link below.
Was this page useful? Spot anything wrong?