Translations:Phytoépuration eaux usées/187/en

As the water in the horizontal flow filter has already been separated from some of the organic material, the purifying plants can be a bit less durable than the reeds, while remaining hardy and adapted to an aquatic environment. Generally, the benefit of the filter is that it increases biodiversity and introduces plants that flower during different periods of the year. The planting density should be 6 plants/m²