Heathd;4146860; said:Tetra whisper HOB filters. I had one on my 10 gallon that decided to junk out after two months. I also didnt like their cartridges either, as it reminded me more of a media bag more then anything.
ive had one rated for 20gallons on a 20gallon tank, and has been running for 4 years. thaw tank it on has no other filter or source of water mo0vement. all i have is that one filter and its my cleanest tank.