The humble sponge filter has long been a favorite of fish keepers and breeders, for good reason. It provides both mechanical and biological filtration as well as aeration and circulation, at a minimal cost. Simply attach to your air pump, place in the water, and you have a low cost yet effective and efficient filter. They are great for use in temporary holding tanks, fry/fingerling nursery tanks, bait tanks and quarantine tanks. Sponge filters are also fantastic for speeding up the cycling process of a new system or fish tank. Simply take a sponge filter from an established cycled tank/system and place it in your new one for an instant addition of beneficial nitrifying bacteria. The bottom line - Sponge filters pack a lot of punch for very little cost.
Available in multiple sizes to best suit your needs.