Filter Technic Undergravel Filters

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EHEIM Undergravel filter throughflow principle

for planted aquaria

5.0 (2)

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.

54.95 €^*

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EHEIM Undergravel filter suction principle

for not planted aquaria

5.0 (2)

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.

54.95 €^*

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EHEIM Extention set for undergravel filter

5.0 (1)

EHEIM extension Set for the EHEIM undergravel filters 354000 and 354100. Package content: 6 plates 9x9 cm. Samples: For an aquarium with 100x40 cm you need 20 additional plates, therefore 4x extension set.

12.99 €^*

Compare aquarium floor area, planting, substrate and desired flow direction. Decide between throughflow and suction operation and determine whether extension plates are required.

Choose an EHEIM undergravel filter by operating principle

Reviews: 5.0 (2)

Choose an EHEIM undergravel filter by operating principle

EHEIM undergravel filters use the aquarium substrate as a large filtration area. The current range includes systems based on the throughflow principle or the suction principle, as well as an extension set. The correct version depends on the aquarium layout, planting and intended direction of water flow.

With the throughflow principle, filtered water is directed through the substrate, while the suction principle draws aquarium water through it. These operating modes have different requirements and should not be selected solely by aquarium dimensions. Follow the stated suitability for planted or unplanted aquariums and choose a substrate that permits reliable water movement.

Plan the plate area, uplift or connections and any extension modules before adding the substrate. Once the aquarium is established, changes are difficult. Prevent zones with blocked flow and maintain the system according to the manufacturer's instructions.