Aquarium Sponge Filters
Aquarium sponge filters are simple, effective and inexpensive. Aquarium sponge filters are ideal for tanks with tiny fish or fry, as they can't suck anything up. They are perfect for quarantine tanks as they won't filter out medications. They make excellent biological filters, quickly building bacteria, and also work well as mechanical filters. Ultimately they are a reliable and hassle-free choice that work well in smaller tanks and are great as supplemental biological filters in heavily stocked tanks. All sponge filters can be driven by air pumps to increase filter flow and aeration.
Note:If you're looking for replacement sponge or foam inserts for other filters, browse our sponge filter media section.