Overflow 1074 and performance

Overflow 1074 and performance

Enquiry from Mr. Ebert / Germany

I would like to fit an overflow to my aquarium 160x60x60 cm. According to the homepage this would be No.1074, 1075/2 and inlet kit 1073. Can I operate everything with a submerged Eheim pump 1060 and how large must my cabinet filter tank be ?
If I need another pump, which model should it be ?

Answer

This outlet is designed especially for operation of a cabinet filter with glass basin without glass bore. Its recommended performance is 900 l/hr but it can also be increased to just over 1200 l/hr. To obtain even more performance you need a second overflow 1074 and the pipe fittings 1075/2. The Eheim pump 1060 or any other pump with the same performance may be used of course. Please bear in mind that the specified volume of water in the outlet is not exceeded (depending on the water level and the loss in the inlet pipes. To this end a ball cock should definitely be fitted in the water circulation of the pump, which naturally means a certain loss of power. TUNZE supply the Turbelle elecronic 7100/2, which is highly suitable as a recirculation pump. Its driver is variable from 800 to 1600 l/hr at a pump height of 6.2 metres.
When you stop the recirculation pump a certain volume of water flows back into the cabinet filter until compensation of the level. This volume of water consists of the difference between "level pump on" and "level pump off": it is highly important that the filter can hold this volume of water. In your case we expect approx. 20 l water, i.e. altogether you need a filter capacity of approx. 50 l filter water (depends on the technology), plus 20 l return water when the recirculation pump is stopped plus approx. 20 to 30 l to be on the safe side.