DESCRIZIONE
A pond filter with a filter medium (8) which is accommodated in a housing (1) with a water-feed opening (5), a water-discharge opening (7) and a sludge-discharge opening (6), wherein a collecting space (9) for particles of dirt (11) is formed beneath the filter medium (8), has, according to the invention, a sludge pump (17) for discharging the particles of dirt (11), and also has a control means (16) for the sludge pump (17), wherein the sludge pump (17) is arranged preferably within the housing (1). The pond filter preferably contains a water distributor or particle separator (18) which has directing elements (19) which are arranged such that the inflowing water has energy extracted from it and is calmed in respect of turbulence. The separator may be designed as a lamella separator with directing elements (19) in the form of lamellae which form the outer geometry of the separator, and with an inner, preferably substantially vertical flow channel. The water-supply line is preferably arranged in the top half of the water distributor.