aquastation DC-4000 Silent Swirl Controllable DC Aquarium Pump 25W 1050GPH-marine wavemaker Return Pump with sine Wave Controller for Salt/Freshwater Coral Reef Fish Tank Sump Circulation (DC4000)

This is the best pump I have used, it is super silent, I have to check the output to make sure its running, installed it yesterday only, will update incase of anything

I used this pump for almost a month now, it is so quiet compared with the 2 other pumps I have purchased before, even those 2 other pumps were also advertised they are quiet products. I have a 200-gallon fish tank set up in my living room, the sump pump is below my fish tank inside the cabinet. The environment is really quiet. After I use this DC-4000 pump, I can't even hear the pump is working, all I can hear is the water running. When I first install it, the pump was set to pulse pumping mode, without the user manual, I can not figure out how to change it to the proper setting. Those setting does not make sense by just look at the controller display. After I read the manual and programmed it to the setting I want, it works perfectly. From time to time, I turn off the power to do the water change, the setting will remain after I power it back on. Overall, just need to read the manual, program to the setting you want, then it works perfectly. I totally recommend it to other users.

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Been using this pump for 3 years now works wonderfully

This pump is basically silent. I say basically because you can hear a slight whine when the room is dead silent. The size works well in a a 20gallon long sump and moves enough water to to keep the tank stable. The wave program definitely is nothing to go crazy about but it works.

The negatives (only a few but not bad): 1). There should be a 90 degree angle input option that can be screwed on so that it can work in lower water levels. 2). The remote should have an on/off, not just a 10 minute "feed" shutoff option. I ended up buying https://www.amazon.com/gp/product/B01FT4RBBM/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 to turn the pump on and off. 3) One set of plugs is not screw in, and they tend to fall out or get pulled out and of course the pump won't work. 4) I make fountains and I know there are many people who will use these for other than fishtanks. So perhaps the word "FEED" can be replaced by the word "PAUSE" so that people can use it on fountains, in water walls and other places besides fishtanks. As I said, these are mainly all minor... This is a really great pump. The positives: It's great! It's so quiet. Even on the level 20. I like that it goes up 20 levels. Many pumps go up to 3, 5, 10. It pumps the amount that they said it does. I also like that it's white and black, which matches the fountains I produce. The connection design and the pieces that go with them are good, strong and solid. I have tried mostly every pump on Amazon. This is clearly top for me and I plan to buy more. I plan to buy many more.