The Dazs EX Power Fan aquarium cooling is such a simple and practical device, it’s a wonder why something like it hasn’t yet been brought to the aquarium market. While perusing the charming Tropicals and Marines store in West London, we stumbled upon this unique aquarium cooling fan which was operating to discreetly cool a reef aquarium using high powered lighting. This slim profile DC fan uses a centrifugal design to blow a respectable quantity of air from an adjustable outlet as the EX Power Fan hangs nice and neatly on the edge of the aquarium glass. Although this unit was installed on a trimless aquarium, the bracketing on the hanger will adjust to accommodate the aquarium trim or brace that is over an inch wide. The Dazs EX Power Fan comes in a small or large size and the small unit we spied at Tropicals and Marines was selling for just under fifteen quid (that’s £15 or roughly $22). Compared to the repurposed computer fans of the Tunze Aquawind, the Dazs EX Power Fan is much less expensive or obtrusive, and probably more practical to use for cooling smaller nano reef tanks. Although we’ve never heard of the aquarium product manufacturer Dazs, as with other products that Reef Builders has introduced to the American reefing audience, we expect that one of our drygood vending sponsors will soon have these on pre-order well in time to protect your aquarium from the looming summer heat. Few more pics after the break.