Originally Posted by foster53
400's are good filters, BUT over time the bearings that the bio wheels ride on wear, and ther wheels stop turning. If you get one make sure you can order extra bearings when needed. I got rid of all my emperors, and went with 110's, no cartridges to buy
If noise is a factor, then another reason to go with the AC
series. The Emperor 280 made a noticeable hum. It was somewhat loud. I've replaced it and now i can't hear the AC
at all. Now all I hear are the fans on my desktop PC
and thats starting to drive me nuts!