Check the listing for details. Evolution Aqua EvoUV - 25 Watt. Condition: New. Listed at 271.99 USD. Evolution Aqua EvoUV The Evolution Aqua evoUV deliver a more efficient and more economical performance than before thanks to their new design. The 25 Watt model is perfect for use on the smaller garden pond.The design of these UVs optimizes flow rates and improves energy efficiency, with the sole focus to deliver optimum performance at all times to clear green water in ponds which is caused by single celled green algae.evoUVs will work alongside many different filtration systems and are incredibly easy to install with flexible hose or hard pipe and can be easily fitted within existing pipework runs.All evoUV models come with high output UV bulbs powered by energy efficient ballasts, all housed within a fully watertight, robust housing. Pump-fed installation: Install EvoUV before the filter on the pipework run from the pond. Gravity-fed installation: Install EvoUV after the filter on the return to pond pipework run. Evolution Aqua EvoUV - 25 WattMax Pond Size: 5,284 GallonsMax Flow Rate: 2,642 GPHBulb Power: 25 wattInlet/Outlet: 1 1/2"Fittings Supplied: 2 x 1 1/2" Threaded HosetailsDimensions: 20.87" x 6.58" x 3.47"