Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It's SO loud compare to Top Fin

This was suppose to replace a 3.5 years aging Top Fin 1000 (10 gallon pump). Whisper 10 is about 4 times louder than the aging pump, which I can hear it about 10 feet away, subtly. I can hear Whisper 10 from another room! Either I got a defective unit or Tetra has a different interpretation for the word whisper.