Tetra Bio-Bag Disposable Filter Cartridges - Small Aquarium Filter Cartridges at Pet Mountain

On January 22, 2011:
These are so cheap that I don't mind how often I change it. I have a 5 gal tank with a fancy gold fish, a pleco, and a tiny air pump filter that uses the smallest of the biobag filters. I've never had any problems with it other than algae building up in it from the algae chips I feed my pleco, which is easily solvable by taking the filter out, rinsing it and putting a fresh cartridge in. I wouldn't recommend it for large fish communities, even if you get the larger filters. Larger communities need more bio filtration, and mechanical filtration than the simple carbon based biobag cartridges/filters can offer.

On September 20, 2010:
we are novices in the the"Aquarium hobby" and find the whisper bio bag an easy and positive producer. (The fishies like it too!) Trish

On August 23, 2010:
This filter fits snugly enough to catch everything. It's beyond simple. The carbon dust rinses out quickly. Three days without the filter is dirtier than two weeks with the filter; although I try to try to change the water weekly.