Taken from the Morton Salt web site: http://www.mortonsalt.com/faqs/water-softening-faqs
Morton® System Saver® II, Morton® White Crystal® Rock Salt, Morton® Solar Salt and Morton® Rust Remover are all high-quality water softening salt products for use in your water softener.
Morton® System Saver® II Pellets are specially formulated with very high purity salt, guaranteed to be 99.5% pure, containing virtually no insolubles to be cleaned from your brine tank. Made from a proprietary formula, Pellets with System Saver® II Formula are designed to aid in:
Improving regeneration efficiency of the resin in your softener through continuous cleansing of the resin
Preventing the buildup of various damaging hardness minerals that can accumulate in valves and screens in your softener, potentially causing it to malfunction Laboratory Testing* shows that the use of Morton® System Saver® II Formula helps enable a water softener to do MORE…
Removes nearly twice as much dirt and impurities
Removes up to 5% more hardness minerals from your water
Morton® White Crystal® Rock Salt is 98.9% pure salt mined from underground salt domes. White Crystal® Rock Salt is available in coarse and extra coarse grades both of which can be used in your softener. Because Rock Salt is mined from a dome contained in a rock, it will contain a small percentage of impurities. These minerals may build up in your brine tank and will require periodic brine tank clean-outs to remove sediment.
Morton® Solar Salt is 99.7% pure salt harvested from natural salt brine through solar evaporation. Solar Salt is also available in coarse and extra coarse grades. Because solar salt is produced in open ponds, some impurities from the environment get in the salt. The presence of these impurities also requires periodic cleaning of your softener tank to remove sediment.
When iron is noticeably present in your water supply, we recommend that you use Morton ® Rust Remover Salt, a pellet-type salt product with rust remover dispensed throughout each pellet. Rust Remover salt automatically helps fight the build-up of rust in your water softener and it removes 15 times more iron from your softener resin than plain salt.
*Based on laboratory testing for dirt and impurity removal during brine and backwash cycles using 22 grain hard water comparing System Saver® II Pellets with regular pellet salt.
Morton® System Saver® II, Morton® White Crystal® Rock Salt, Morton® Solar Salt and Morton® Rust Remover are all high-quality water softening salt products for use in your water softener.
Morton® System Saver® II Pellets are specially formulated with very high purity salt, guaranteed to be 99.5% pure, containing virtually no insolubles to be cleaned from your brine tank. Made from a proprietary formula, Pellets with System Saver® II Formula are designed to aid in:
Improving regeneration efficiency of the resin in your softener through continuous cleansing of the resin
Preventing the buildup of various damaging hardness minerals that can accumulate in valves and screens in your softener, potentially causing it to malfunction Laboratory Testing* shows that the use of Morton® System Saver® II Formula helps enable a water softener to do MORE…
Removes nearly twice as much dirt and impurities
Removes up to 5% more hardness minerals from your water
Morton® White Crystal® Rock Salt is 98.9% pure salt mined from underground salt domes. White Crystal® Rock Salt is available in coarse and extra coarse grades both of which can be used in your softener. Because Rock Salt is mined from a dome contained in a rock, it will contain a small percentage of impurities. These minerals may build up in your brine tank and will require periodic brine tank clean-outs to remove sediment.
Morton® Solar Salt is 99.7% pure salt harvested from natural salt brine through solar evaporation. Solar Salt is also available in coarse and extra coarse grades. Because solar salt is produced in open ponds, some impurities from the environment get in the salt. The presence of these impurities also requires periodic cleaning of your softener tank to remove sediment.
When iron is noticeably present in your water supply, we recommend that you use Morton ® Rust Remover Salt, a pellet-type salt product with rust remover dispensed throughout each pellet. Rust Remover salt automatically helps fight the build-up of rust in your water softener and it removes 15 times more iron from your softener resin than plain salt.
*Based on laboratory testing for dirt and impurity removal during brine and backwash cycles using 22 grain hard water comparing System Saver® II Pellets with regular pellet salt.