With this new accessory set, all external filter makes with hose diameters of 12/16 or 16/22 mm can be perfectly optimised in the suction area. Firm connection with variable installation and selective function is ensured by the plug-in connections. In the flow area Installation Kit 2 ensures optimum pressure conditions with variable installation options. The water outlet can be adapted to the aquarium dimensions by means of the plug-in nozzle tubes, the hoses can be connected safely thanks to the quick release coupling, and the set can be easily cleaned via the closing cap on the overflow arc. A separate nozzle set including an elbow and three different attachments as a wide jet, outlet or adapter for connecting a diffusor is also available as an accessory.