A water softener should be sized so that it does not regenerate any more often than every three days (wastes water and salt), nor go longer than 14 days before regenerating (can cause compacting of resin, and fouling with sediment or iron). Seven days between regeneration is the best - especially if iron is present.

Enter the number of people in your family:
Enter your water's hardness: (in grains per gallon)		gpg ppm (mg/l)
Note: If you do not know your waters hardness, order a test kit (click here) or call your local water company.
Enter your water's iron:
Note: Iron MUST be dissolved iron meaning that the water appears clear in color. Municipally treated water usually does not contain iron

Total Grains Per Day:
Recommended size: