4pcs Fish Tank Sponge Filter

<br>Are you looking for a professional, yet affordable replacement aquarium biochemical sponge filter? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? If yes, look no further<br> Our replacement aquarium biochemical sponge filter must meet your needs. It is one of the best choices for you.<br>Features<br>-Color:Black<br>-Material:Plastic, sponge and stone<br>-Size:8.00X5.00X5.00cm/3.14X1.97X1.97in<br>- The sponge is dense and can filter out a lot of large particle impurities.<br>- Nitrifying bacteria will start reproduce on sponge after some time, better filtration effect.<br>- Stone in filter can absorb metal ion and balance PH level.<br>- Plug in air pump to supply oxygen into the fish tank.<br>- Note: when put the filter into water, please pinch the sponge part so that the filter will sink to the bottom.<br>