This fact sheet explains floating treatment wetlands (FTWs) as a sustainable stormwater management practice that improves water quality in ponds and lakes. FTWs use floating rafts with hydroponic plants to remove pollutants such as nutrients, sediment, and metals through biological uptake, microbial decomposition, and filtration. The publication outlines how FTWs function, where they can be used, and their benefits, including flexibility, environmental enhancement, and relatively low cost, while also noting limitations such as maintenance needs and performance variability.