Filter Technic Undergravel Filters

The EHEIM undergravel filter forces a slight current of water to rise through the bottom gravel from below. As a result oxygen-requiring bacteria, which process all organic waste products to biologically harmless substances, settle there. The bottom gravel will no longer become clogged, and as well as acting as an extra biological filter, it aslo encourages rich plant growth.

The EHEIM Undergravel filter with suction principle works as an additional biological filter. The water flows through the gravel in the undergravel filter. It is particularly suitable for marine water aquariums and fresh water aquaria without plants.

EHEIM extension Set for the EHEIM undergravel filters 354000 and 354100. Package content: 6 plates 9x9 cm.