Transportable filter module for filtering nutrient-poor -cleaned water for domestic use from a pool

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Transportable filter module for filtering nutrient-poor -cleaned water for domestic use from a pool or a swimming pond, with : -a transport container (1) for a subsurface installation [...] Arrangement or for at least partially, -a biofilter, the extends in the transport container (1) is formed as a multi-stage filter, wherein -a first filter stage as plant filter (2) with an upper bed (6) formed thereon and a planting (7) is formed, whose roots (8) at least the upper bed (6) such that it passes in the transport container (1), and-a second filter stage than nutrient filter with a lower bed (9) is formed, in the transport container is made the binds (1) below the upper bed (6) arranged and from a filter material, which nutrients, in other words at least phosphate, in the first filter stage in the to be filtered, has been associated with dissolved nutrient-poor -cleaned water for domestic use, -an inlet device, the the transport container (1) and configured to be filtered, to the biofilter nutrient-poor -cleaned water for domestic use for filtering on...