Summary Limited phosphorus reservoirs are in stark contrast to the rising demands in phosphate, which plays an important role in the agricultural industry as a key component of fertilizers but runs off over the ground. Phosphate draining into the body of water poses a severe threat to aquatic ecosystems since excessive nutrients cause eutrophication in surface waters. Our research showed that duckweeds can reduce the phosphate concentration in freshwater down to less than 40 ppb. Within their natural lifecycle, duckweeds accumulate phosphate, nitrate, and potassium ions, which can therefore be remediated. Using duckweeds as an ecological, environmental friendly and sustainable alternative to industrial fertilizers allows to promote a natural phosphate cycle thereby protecting limited natural resources. Here you can find a short video about our project.