| 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. The basic set includes 24 plates 9x9 cm each. This is sufficient for an aquarium with 80x35 cm. The extention set 3545 is to be used for larger aquaria. |
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EHEIM Undergravel filter suction principle