Tru-Soft® Solar Salt Crystals for water softening are naturally formed crystals that are selectively harvested from a salt lake in Carlsbad, New Mexico. Our solar salt crystals are NSF certified. Tru-Soft® Solar Salt Crystals are a cost-effective option for water softening as they can reduce bridging and mushing in water softening units and help reduce scale buildup from hard water which can increase the lifespan of pipes, fittings, heaters, boilers, and other appliances. Since scale buildup can impair the efficiency of your appliances, our water softening products could even help lower your energy bills!