Marina Battery-Operated Air Pump

I have a few different sized tanks (from 5 gallons to 250 gallons) and purchased several of these from a local pet store in preparation for Hurricane/Tropical Storm Irene. I ended up not needing them, but they were a blessing when our power went out from the recent Halloween snow up in the northeast 5 days without electricity. They will last pretty long on 2 D batteries I would say 12-16 hours. They were loud in my opinion, but a good emergency backup system. You can hear them rattling when the battery supply runs low. They are best for tanks that are 10-20 gallons in size. I would suggest getting more than one if your tank is larger. On a side note, many of my prized tropical fish ended up dying not because of lack of oxygen, but from the sheer cold (we were out of hot water and heat as well for the 5 days), so we are now looking into a generator.

My daughter and I drove from Los Angeles to Washington, D.C. with two discus in her Mini Cooper this winter. Our two major concerns were the cold weather and aeration. This small battery operated pump worked perfectly both in the car while traveling and in the hotel at night. The two D batteries only needed replacing every other day. After careful container preparation with the pump and hand warmers for heat, the fish made it beautifully to their new home on the east coast.

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My home unfortunately is in an area where we are frequented by power outages due to high winds. This put me in a worrying tizzy for my goldfish tank, and so I looked into getting a battery-powered pump. I decided to give this one a try. (Fortunately every time I've used it the power was shut back on within the day, so I haven't had to leave it on for an extended period.)

It was easy to turn on and off, but the airstone that came with it was flimsy so I decided to attach a larger airstone to the nozzle (I don't think it made a whole lot of difference though). It produced a small amount of bubbles, about as much as you'd expect a pump of this size to make. But it did its job in that it kept the oxygen in my tanks up in place of the filter, and I have yet to lose a fish while using it. One con, it is rather noisy. It's nothing obnoxious but it is noticeable.

I cannot say for certain if it's effective for long periods of time yet. However I think it's safe to say it'd be more effective in smaller tanks, around 10-15. For anything above a 20, I'd recommend buying two of these to be safe.

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Had to said that I am surprised with this product, I first bought it to make sure that it was available in case of any power outage in my home due to weather condition, since I live in Puerto Rico and this is the peek time of storms and so. Yesterday I was able to try it, power out and pump on, at first I thought battery will run out and it will be noisy, wrong in both, it last for as long as 12 hours+(the time power was out)and you can hardly hear it, fishes seem happy around it lots of bubbles out of the tiny stone, the only thing I can said is that the tube is short, although not a big issue for something that is for emergency only. Great Product overall!! Very happy with it! :-)

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JUNK---did not work AT ALL -dumped brown battery acid into transport container and kiled 3 of my saltwater fish. i put it in a 5 gallon bucket--it bubbled for a few minutes and stopped..I was in the process of moving so i left it in as my only option...only to take it out 2 hours later and it leaked brown water into the container.

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