Abstract: An aquarium filtering system including a distribution housing having at least two distribution ports, the distribution housing further having a water supplying orifice and a water evacuating orifice for connecting the distribution housing to the pump, the distribution ports being fluidly connected to a water supplying orifice or to a water evacuating orifice, the system further including a filter assembly having two filter ports and filtration means for filtering a water flow from one filter port to the other filter port, connection means for detachably connecting the filter assembly to the distribution housing so that, upon connection, each of the filter port is fluidly connected to a corresponding distribution port, and sealing means for, upon disconnection of the filter assembly, fluidly closing the filter ports and the corresponding distribution ports.

Abstract: An aquarium water heater includes a hollow heat-conducting internal tube with an electric resistance heater element and electrical connections disposed adjacent an outer surface of the hollow heat-conducting internal tube, a temperature thermal cut-out switch electrically connected to the heater element for overheat protection, and a heat-conducting, electrically insulating polymeric filler spaced between the internal tube and an external tube that circumscribes the internal tube and the heater element.