"Walter R." wrote in message ...
Hardness is about 15 grains. Comes from the Colorado River: Too thick to
drink, too thin to plow. No other problems.

Stick with the Fleck 5600. It's by far the most widely used and
reliable control head in the home water softener market.

Get a unit that does not have the media tank inside the salt tank.
Separate tanks are much easier to clean and service.

Has your water been tested for total alkalinity?