Tetra EasyCrystal Bio Filter Sponge 250/300

The Tetra EasyCrystal Biofilter sponge ensures crystal-clear water through intensive biological filtering. You can easily replace the filter sponge. The fine pore structure offers a very large surface and ensures a slow and even flow. Every now and then you should replace the filter media in your aquarium filter to ensure consistently high filter performance: in addition to changing the water, it is also important to maintain the filter.

Our expert Oliver Knott recommends:

With the Tetra biological filter sponge, filter media can be replaced quickly and easily and thus guarantee optimal water quality and crystal-clear water!