The one I got from my local pet store was great but huge. It took up a lot of room in my 20 gallons. This more compact seems to have good bubble power. 2 problems, 1 was quite difficult to attach the air hose. 2. No air stone. One of the Petsmarts had a built-in air stone. Otherwise it's great. Don't forget to squeeze the air out so it goes down.
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