Not sure people have noticed, by Hydor Koralia has come out with a new generation of powerhead. http://www.hydor.com/eng/prodotti-tecnici/movement-pumps/koralia-3rd-generation.php So I bought one to test out. Specifically the 1950. Here is a quick review. Noise : GREAT! Amazing. Nearly dead silent. And I am very picky. For example, I think the Gyre is way too noisy. New mount: VERY GOOD. Instead of a post from mount that inserts into a hole in the powerhead, they have an extra magnet system. So the powerhead itself connects to the base with a magnet. External Magnet -> Tank Wall -> Base Magnet -> Powerhead magnet. This is a big win in my mind. It reduces space, with no post. It makes it a lot easier to adjust, since that friction ball joint could be a pain. But best: you can very easily pop the powerhead out for cleaning, without disturbing base. The downside is that it moves a bit too easily. Easy to bump and change direction. Magnet strength: POOR As usual for Koralia, cheap weak magnets. Says it is capable of half inch, but would fall off with a little touch. Efficiency: GREAT! These are the best for power efficiency by quite a bit. Moving 300 GPH / Watt is amazing. Compare that to the fairly efficient WP-40 at 85 GPH / Watt. Controls: BAD/GOOD This is strictly on/off. So no fancy wave modes, so rather poor by modern standards. But it is soft start, and seems to work well, so good for an old relay based wavemaker. FLOW: FAIR Frankly, I was a bit disappointed. It was not bad, but not what I really wanted. I have no way of measuring the strength in exact GPH. So cannot comment on that. There are 3 flow nozzles to play with. I primarily checked using the "normal" one. Flow was not very even coming out. Stronger at one angle, about 25 degrees off center. I would say by feel that the old magnum-5 was stronger. But stronger can mean more of a jet, less diffuse. And diffuse is usually a good thing. OVERALL: If you want quiet high efficiency diffuse flow, and don't care about fancy wave action, this is a really great product. It should be a good fit for my new fuge/frag tank. But for my long main display tank, I need something different.