Eheim Biopower 240 Internal Filter (2413) 160-240LEheim Biopower 240 Internal Filter (2413) 160 240L Product Description The special thing about biopower is that it offers multi layer filtration just like an external filter. The closed filter baskets are filled with highly efficient filter medial (e. g. SUBSTRATpro). The inlet basket with filter cartridge for the mechanical biological prefiltration is located at the bottom. The water sucked in at the bottom is pumped to the top through the various