Currently I am using a Hagen AquaClear power head with the quick filter insert. Inside of the insert there is a cartridge that I put activated carbon into. It keeps my water super clear, but it can be a little messy. Was thinking about the Tetra that has activated carbon covered with sock material. The cartridges cost a little over $1, which I could change every week. I have a 20 gallon high. Buy the way the Aquaclear sock material really sucks. Been thinking about rapping the cartridge in 50 micron polishing material. Thanks all



