The invention concerns a device for forming concretions in an electrolytic medium by electrolysis, comprising an anode (110) and a cathode (120) submerged in the electrolytic medium and a regulating circuit (100) configured to regulate an electrolysis current in order to form concretions on the cathode (120). The anode (110) and the cathode (120) are used as a current source for supplying the electrolysis process and are connected in the regulating circuit by at least one regulating element capable of limiting the electrolysis current.
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