Water Softener Alternative Medium Refill Media
For hard water with hardness up to 25 grains, change after 350,000 gallons or 5 years.
This is the media for inside your tank. You remove the old media and put the new media inside.
Turn off the water. Unscrew the top. Empty the old media onto a tarp. Put the new media in. Reattach and turn water back on.