Since solar salt contains slightly more water insoluable matter than (evaporated salt) pellets, consideration should be given to salt usage, softener cleanout frequency and softener design. If salt usage is light one could probably use the products interchangeably. If salt usage is heavy, insoluables will build up faster when using solar salt, and the need to more frequently clean the brine tank/reservoir will be increased. Brine tank cleanout can be a messy task.
