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.

Fantastic pump! Plenty of power and extremely quiet. Time will tell but so far great value. Love the variable speeds and digital display. Have it running submerged in my sump pushes plenty of water straight up 5’ through 1” PVC. 300 gallons per hour on setting 7.Odd thread size though. There’s no fitting out there at your local hardware store that will fit it. Not a problem if you use hose or tubing but I wanted to hard plumb it into my existing system. Had to get creative. Used the large hose barb fitting it came with and glued that into the pipe. Works great.

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Been using this pump for 3 years now works wonderfully

I started our using it as a booster pump for my Fluval 407. It was so much more powerful and quieter that I just unplugged my Fluval and just use it as a non-pump canister filter.