DirectionsPut on the pump head and examine the o-ring for correct fitting. Close the clips. Place filter underneath aquarium – it must be below water level. Fit outlet pipe as per drawing A or B. Assemble suction pipe and strainer and attach to side of aquarium with 2 suction cups and fit hose connections to filter: suction side on bottom intake nozzle, pressure side on pump head. Fasten hoses with clamping nut. There are 3 ways to prime the filter. 1) With the starter bulb (order no. 4003540), 2) with the Universal Installation Kit 1 (order no. 4004300) or 3) by sucking the hose on the pressure side. Connect the pressure side hose to the outlet elbow and the spray bar while the filter fills with water. The pump can be switched on when water has filled the filter, and for a short time while trapped air is exhausted from the filter media a slight noise from the pump will be heard (this is normal). Fit the plug into the end of the spray bar after all the air bubbles have disappeared.