Koralia EVOLUTION 850 High Flow Power Head by Hydor.
The Koralia Evolution 850 circulation pump offers the apex in efficiency and flow. Designed to work with wave timers, Koralia Evolution 850s also feature extremely low power consumption and superior energy efficiency.
With a smaller footprint than previous models, Koralia Evolution 850 pumps blend seamlessly into your aquarium's backdrop. Koralia's patented magnet suction-cup technology is improved too: now featuring a vibration-absorbing element to minimize movement and support smoother flow.
* WATTS: 4.5W
* OVERALL DIMENSIONS: 6 in. x 6 in. dia.
* MAXIMUM FLOW RATE: 850 gph
* MAXIMUM TANK SIZE: Fresh - up to 90 gallon./ Salt - 50 gallon
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Great for the price, but not high-end by any means Review by Ken
This is a very basic powerhead. it is great for the price, but if you use it with timers, you may find it a bit noisy on startup. You get over it real quick. I appreciated the low cost as I got into this hobby, but I have since replaced these pumps in my tank with DC controlled ones. With even my short lifespan of usage with these, they were worth every cent and I have since started using one in my water change container when I am mixing up a big container of water. (Posted on 7/21/2014)
quiet Review by jodyg
silent and it moves some water. i have mine installed behind my liverock and it is wonderful gives great movement (Posted on 10/31/2011)