kirucd @ thanks for help
thing is as follows. I do not have an aquarium because I'm still in preparation an planing. I plan to have a freshwater aquarium 130x50x60 cm size (length x width x height). Since I'm new in the aquarium vorld i do not know how much flow would be required. I know that this overflow is more needed for salt vater aquariums but they are also good for freshwater aquariums.
So if you do not mind i will ask you for some plans. I would be werry thankful.

Regards

Kirucd @ i love this overflow it is awsome.Because I do not understand Romanian would i ask if you could please make plans with measures with sketch.
Thank