Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Strong and silent

This product is just as it says it is...whisper quiet and even though it says its for up to 10 gallons I am actually using it in approximately 30 gallons of water right now. However I am not using it strictly for fish. I have it set up in my aquaponics tank just to add extra oxygen flow into the water and it is working great for that.