I recently had a water softener (everyone is Wisconsin/Madison, does. It is seemingly a requirement and houses are plumbed for their installation) installed in the home that I purchased. The home is about 14 years old and never had a softener. As a result, the hwh was caked in lime and recently died (only at 25% of capacity). I have read the owner's manual which doesn't tell me: a) how much salt to put in, other than to use their brand of solar salt and b) how often to do regeneration. Regeneration can be set for a specific number of days 0-28 or automatically when it is sensed it is needed. The model is a Hellenbrand H100. Can anyone help? Only the hot water is softened and there are two of us in the household, so we are looking at hot water usage of about 60 gallons per day.