Genuine Replacement Sponges for the Elite BioFoam Sponge Filters are designed to effectively trap dirt and debris in aquarium water. 2-pack.
Other size available :
Elite Double Sponge Filter
Elite Single Sponge FIlter
* Blue Fish Aquarium Note: Remember that all sponge filters work the best with a high volume of air going through the uplift tube. If you undersize your airpump for the depth of your aquarium you will lose efficiency/effectiveness of any brand spongefilter. We recommend that you run this filtration with an airpump, however if you use a powerhead please also add surface agitation to your aquarium.