Another great Tetra product. For aquariums up to 40 gallons this filter is great. I have had mine for 5 years now. I have a 30 gallon aquarium and I run two Whisper Power filters. They hang on the back of the aquarium and only require a filter cartridge to work. My water is crystal clear. They don't make noise and run like a charm. After 5 years of use I have only had to replace one part, the impeller in only one filter. That's the good thing about these filters, you can buy all the replacement parts at your local pet store. I know the Petsmart and Petco carry them. They are easy to assemble and easy to use. About once a month when you do your usual water change, you replace the filter cartidge. Also, they can be purchased at Wallmart for a fraction of the cost. The filter cartridges can also be purchased at Wallmart. The replacement parts cannot.
Whisper Power Filters Whisper Power Filters is recommended by Marie41