12
stronger so that no air is dragged along. At least in the initial phase this has to be controlled
regularly and, if necessary, to be adjusted.
With the supplied PVC tubes with moulded keys on one side for holding the nuts of the bushings
(tank fittings), these nuts can be tightened or released in the overflow box or aquarium. The
bushings have to be installed according to Fig. 1. Always re-tighten before use. The nut of the
emergency overflow has to be screwed from the bottom. The PVC tube key can be pushed out of
the chamber of the filter tank from underneath over the tube of the emergency overflow. The slide
ring and nut have to be mounted manually beforehand and tightened as much as possible. The
rubber slide ring must always be attached to the side of the rotable nut, the rubber gasket on the
opposite side of the panel.
Fig. 3: Bushing or tank fitting
(the glass pane is placed between slide ring 3 and rubber ring 2)
1.
Thread
2.
Rubber sealing
3.
Slide ring
4.
Nut
There is a blue fitting in the mounted bend of the return line. Here, air is sucked in when the pump
in the cabinet fails. This prevents the formation of communicating pipes and an overflow of the
filter tank by returning water.
When starting the aquarium, water has to be filled in until the filter tank is filled up to 10 – 12 cm
in the front part and then the pump has to be started. If the water level in the filter tank
decreases, water has to be filled in until the a.-m. maximum is reached. Take care that enough
space is left so that the inflowing water in case of failure or shutdown of the circulation pump still
fits into the filter tank.