Biological filter media for the growth of beneficial bacteria.
JBL SintoMec is a highly porous biofilter material made from high quality sintered glass rings, which is particularly good for intensive long-term biological filtering in freshwater and saltwater.
The internal hole diameter is 5mm, resulting in thicker wall depth and providing a more effective surface for bacteria that break down pollutants. 1 litre has 1200 sqm effective surface, 5 times as much as conventional clay tubes.