A High Capacity Cation Exchange Resin for Domestic Applications (Hardness Reduction & Water Softening)
Five pounds of cation resin is enough to refill 2.5 inch x 10-inch refillable filter (for standard 10" housing) about 7 times.
Our high-grade cation softening resin is ideal for applications where the reduction of TDS or hardness is required or can be used as a pre-filter to prevent the build-up of scale on sensitive equipment.
The process involves passing water containing hardness ions, namely calcium (Ca2+) and magnesium (Mg2+) through a column containing a strongly acidic cation exchange resin in the sodium (Na+) form (i.e. the exchangeable cations are sodium). The calcium and magnesium ions are exchanged for an equivalent number of sodium ions. The resin, once exhausted, (i.e. all the available sodium ions have been exchanged) must be re-charged. This entails passing a solution containing a high concentration of sodium salts such as brine (sodium chloride) through the ion exchange resin - a process known as regeneration.
Commons Cations: Hydrogen (H+), Sodium (NA+), Potassium (K+), Calcium (CA+2), Magnesium (MG+2), Ferrose (FE+2), Ferric (FE+3)