Regeneration Adapter - Crystal KH filter
Regenerative adapter, for Crystal KH Cartridge only.
KH Cartridge contains resin that removes limescale by means of ion exchange.
With time and use, the resin will get saturated with limescale.
To remove the limescale buildup from the resin you mix water with plenty of salt in a soda bottle, connect it with the assembled adapter, plug in to your KH cartridge and pump the saltwater through.