Sponge filtration is an often overlooked type of aquatic filter device for freshwater tanks, ponds and bowls, and even marine aquariums. Many persons look past their simplicity as ineffective, but therein lies their quality.
For the best in Aquarium Sponge Filters

For stand alone filters, please see our Sponge Filter Kit Page with more exact aquarium sizes for stand alone filters.
AQUARIUM PRE-FILTERS: See this page for Sponge Pre filters for your canister, wet/dry, or power filters. Great for live bearer aquariums, baby aquariums, etc. (including replacement sponges)
HYDRO POND FILTERS For Hydro Pond Filters, follow this link
Hydro Pond Filters are also excellent for use in high flow aquarium sumps or similar.
For further Sponge Filter Resources:
Sponge Filtration
Sponge Filters