Instruct: Classify Amazon reviews into positive or negative sentiment
Query: lasted 3 days

I have a 55 gallon aquarium but it is deep, so I needed a powerful air pump replacement when my unit failed. I got overnight shipping on this, because my fish could not wait. When I took it out of the box and hooked it in, it was VERY loud-but it had good aeration. On the second day, there was no output from one of the ports; and on the morning of the third day there was no output at all. But it had finally gotten quiet!! I placed another overnight order and got my original brand of pump and have had no problems. The whisper pump will not be recommended by me to anyone. The box was well packed and undamaged, so obviously the QA at the factory was not completed.