Not exactly water gardening but maybe someone here can help . I intend to divert the greywater from the bath and the basin to a greywater system , the kind where the water passes through a reed and sand/gravel filter . The sand gravel takes care of the mechanical filtration and the reeds or other aquatic plants filer the water by sucking up the nitrates etc . Here is the question , can anyone advise on the plants that do this kind of filtration well .
