Pond construction

摘要

A pond construction comprising at least one pond (1), water purificationequipment attached to it and at least one pump (5) between the two. Thedistinguishing feature is that the water purification equipment is abiological filter that has a layer (2) for filtering water, underneath orwithin which at least one drainage hose (3) ends, whereas the output side ofthe pump (5) is connected by a pipe (6) to the pond (1).IMAGE