Danner 6404 First Impressions
Great air pump.
We can hear the tank bubbles, but nothing noisy from the pumps at all. Not to mention tank depth, etc becomes a factor. And one to the additional accessories for extra oxygen output only. Buzzing, humming, vibrating- they were driving me nuts! I added a check valve to my airline tubing and works as expected. The pump works very well in my 75G tank. My 20H tank is in my office, 3 feet away from my desk.
- Editor's Impressions Of The Danner 6404
- Pump Power
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Danner 6404 Final Thoughts
I hope this helps anyone.
I use this on a 5-way valve for a 75 gallon tank. Buzzing, humming, vibrating- they were driving me nuts! It has one air outlet so i used a spliter& ran a tube to each end of bubbler. I use them in my Tilapia tanks and Koi pond. I put a wire tie Tightly over the tube and barbs and it's perfect. Make sure the hose is connected well. This happened to me with this unit.
Overall Score
4.5
(420 Points)

- Danner 6404 Features & Specs
- Air volume 275 cu.In/Min.
- Max water depth 4'
- Provides oxygen to freshwater/Saltwater aquariums
- Accepts standard Airline tubing
- 6' Cord length
- Manufacture: TopDawg Pet Supply
- Product Dimensions: 9.13 x 3.13 x 3.13 inches; 1 Pounds
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