|   ||Res-Up Feeders attach to your brine tank and automatically dispense the Res-Up cleaner into the brine solution where it cleans the resin during the regeneration cycle.|
The feeder hooks onto the tube inside your brine tank and you just pour some chemical in it and your water softener should last signifianly longer. A res-up feeder is essential if your raw water contains measurable amounts of iron.
The 12 cc feeder is for softeners up to 64000 grains (2 ft3 of resin) .
The 30 cc feeder is for larger softeners over 64000 grains.