The City of Kimberly's drinking water supply is generally hard so water softeners may be benificial. Using one is a matter of personal preference.
Consider the following when deciding to use a water softener:
If you already have a water softener, continue to use it or remove the softener from the plumbing in your house. An unused softener can grow bacteria and may contaminate the water in your home.
NOTE: 1 German degree of hardness dH = 17.5 ppm. For fish tanks, 200-300 ppm is considered "hard", 300-500 ppm "very hard" and over 500 ppm "extremely hard" water.