danny;874213; said:compared to the pro3 i have found the fx5 very noisy
i would say the fx5 is more than twice as noisy as the pro3JMN;876130; said:I have not heard the pro3 running yet, but I almost never hear my fx5. It is in a large stand though. It seems to be very quiet and is grave yard silent compared to my hang on filters on my other tanks.