Replacement foam green BioSmart 18-36000 INT

For BioTec 5.1/10.1 and BioSmart 18000/30000/36000. The heart of a filter lies in its filter sponges: green filter sponges have the finest filtration properties, as they function optimally even at low water flow rates. This means that even very small dirt particles are simply trapped in the sponge as the water flows through, thus removing them from the pond water. But filter sponges don't just perform classic filtration; they also provide ample habitat for bacteria. This small biological oasis ensures the conversion of algae-promoting substances into naturally occurring gases (denitrification). Together with the red and blue filter sponges, they demonstrate excellent filtration performance.