The pump works great. I have a Hawkeye 2 gallon aquarium (which Goldie and I love!) and it puts out more than enough air. A couple of things I didn't know until after I purchased it. I should have maybe read up on it a little better. You will need a regulator to control the air flow, other wise it just pumps a one speed which is a pretty good flow. (I have to turn it off when I feed my goldfish, otherwise the food goes all over the place). If you are going to put the pump on a counter or something like that you also need something for the backflow, or put the pump higher than the tank to prevent the water going back into the pump when you turn it off. Other than that, I am very happy with my purchase. Goldie, my fish, loves it. Would recommend:)
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