Electrochemical activation of water

An immersion wand device for immersion into a receptacle containing an aqueous metal halide salt solution, comprising:

• an elongated housing having a handle at a first end and an immersion head at a second end;
• at least two iridium-coated electrodes each disposed at a distance from one another and at an angle to one another within the immersion head;
• a control module electrically coupled to the electrodes, wherein the control module controls application of electricity to cause a first electrode to be positively charged and a second electrode to be negatively charged;
• and
• a sensor in communication with the control module for determining a concentration of free available chlorine in the solution within the receptacle,
• wherein the control module controls the application of electricity to the electrodes in a manner to perform electrochemical activation (ECA) of the aqueous metal halide salt solution in the receptacle to create an ECA product solution and wherein the distance and the angle between the at least two electrodes are adjustable during ECA in response to a measurement of free available chlorine by the sensor.