I have a Culligan water softener, which also includes the brine tank. There's sufficient salt in the tank, and the softener regenerates regularly as has been programmed, however the water is still hard. I wonder if increasing the salt dosage in regeneration settings would help? Or may be
backwash time could be tweaked? What is the rule of thumb for these settings?
Also, is it normally considered that an average person spends about 75 gallons of water per day?