HydorKoralia Evolution Circulation & Wave Pump , 750-850 GPH, 115 Volts, Black

I really like this wave maker. It is dead silent with good water flow. I have one in a 55 gallon tank and can't hear it at all. Practically no vibration as well. I also use it for my saltwater mixing station and have had no complaints. The magnetic wall attachment had rubber feet with three rubber bands that hold the waver maker in place and this is what eliminates 99% of the noise/vibration. Overall I highly recommend this product for any beginner aquariust.

First time using a wave maker. I was initially turned off by the high price of the brand recommended by YouTubers. I found this one and figured I'd give it a shot. Initially, I had some problema as it kept turning off. I took it out and it ran fine in the sink for an hour so I figured it was something to do with the tank. I may have had too much particulate matter in my tank since it was a new setup.I let the filter run for a few days and reinstalled it today. It's running great now. I'm amazed that it runs silently! It creates plenty of water movement for my 75 gallon tank, and I'm happy to not need bubblers. I'm trying for a quiet tank this time around!

They still work they do the job like the day I bought them and I purchased them over 2 years ago just about although they increased the price on these I just ordered some 3 weeks ago thinking they were the same size as these but they weren’t not sending them back because I already opened them and figured I’ll use them till they don’t work anymore

I ordered two for a 110g tall freshwater tank to help eliminate dead spots. They do that, but barely. They don't move much water, but they are whisper quiet. I'm happy. Only 4 stars because they're definitely underpowered. I've heard about poor reliability, so I'll update this if they fail too soon.

Quite. Moves a bunch of water without blowing my sand everywhere. I have it turning on and off every hour with a cheap timer and it's working well.

I had high hopes in this product. I purchased 2 Koralia Evolution 850 gph in March 2024 and they both have exploded just after 5 months. The front of the Cage that Holds the Rubber anti-Back Spin plug busted out. I reached out to customer support using the email address that was provided by their Facebook Admin. Support advised me to reach out to the store or online. No support information on the website and no way to contact them on Amazon so I’m stuck with two broken powerheads that vacuums the water rather than circulate my tank.

I have used this type of power head for over ten years. To be honest you have to break it down at least once a month and clean it for the magnet on the prop shaft to work strong but that is understandable. I like this side in a 30 gal tank and have two in my 70 gal tank. I also soak it in vinegar water when I see things growing on it or is the red starts to cover. If you maintain as with any moving part you will get years from this head. I have tried many and keep going back to this.

I bought two of these for my 40 gallon saltwater tank because it was actually cheaper to get two of them for $23 each (presumably on sale) than to get smaller ones. I'm glad that they were on sale, because they are perfect for my tank. They put out a ton of flow but the fish seem to love it and my SPS corals are thriving, showing excellent polyp extension with the flow from these pumps. They are easy to adjust and well-enclosed. My one small gripe about them is that the cover can be hard to snap back on, but other than that they have worked great for me. They are pretty much silent, and as with most pumps any noise that they initially make will diminish as they build up a biofilm on the inside from operating in the tank. Unlike other pumps, they don't seem to have an issue with sucking things in either. My snails and hermits sit on them, as well as my mandarin dragonet and neon goby. The goby in particular is tiny, but never seems to be at risk of being sucked in as he perches on them. I have had no issues with my rose bubble-tip anemone either. And of course, you can't beat the tiny amount of energy use from these things, especially for the power and price!I would highly recommend these pumps to anyone considering them for a saltwater tank. They really pack a punch, in a good way!