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Fish tTank and Sump Weir
Existing fish tanks today are designed to be viewed from all directions wasting light that passes through.
The tank design is to be made of a plastic such as Perspex with a white background brightening the tank.
While the weir provides a flow water into an external filter or sump while maintain a water level preventing drainage of a tank and sump.
This design is needed to provide a device to match the simplicity of the tank design while keeping its functionality.