11 of 14 people found the following review helpful:
By Dingo from St Pete, FL
On August 16, 2012:
This fan works great, fits on tank no problem. It's adjustable to aim air flow how I choose, and the fan is quieter than expected but does make some noise. It's not noticable during day and I shut the fan off at night. This fan is to keep the temp down during day while the tank lights are on for the goldfish tank. It keeps my temp about 75, where they need it.