I’m familiar with the salt-based units, and those that use a feeder tank of ash mixture and an injection pump.
The ones that use a coil of wire wrapped around the incoming water line have my skeptical brow wrinkled. For one thing-how can they work when water is rapidly flowing through the water line?
Nothing was found in a search of the topic, so what say you SDSAB chemistry mavens? Is this a valid concept, or is it a pile of hooey?