I recently purchased a Reef One biUbe aquarium and while I love my small fish tank, I couldn't tolerate the loud buzzing noise the air pump delivered. So, I purchased the Tetra Whisper Air Pump for 10 Gallon Tank (couldn't pass up the low price so I got 2) and I couldn't be happier.The air pump that comes with the biOrb tanks don't tend to last long anyway (6 months to a year) and they recommend you keep a spare just in case. The Tetra Whisper Air Pump is way cheaper and comes with a 2 year guarantee so it was an obvious choice over the biOrb pump.While there is no such thing as a "quiet" air pump, the Tetra pump definitely is alot easier on the ears at night when I'm trying to sleep. Of course there is some noise but I can definitely deal with it.