Through this unit, it is ensured that poly-electrodes are prepared and dosed without any intervention after poly-electrodes are located in the reservoir. Full automatic powder polyelectrode supply, solution preparation and dosing is made. Powder or granule polyelectrodes have to be turned into a solution before they are used. Polyelectrodes are used at chemical treatment plants, mud dewatering, before belt presses, filter presses or centrifuge.