Water softeners are sold in several sizes, each rated by the number of grains of hardness they can remove from water between regenerations. The idea is to get a unit that will go at least three days between recharges. Ideally, the water softener can also handle periods of larger than normal water usage..Even if your current softener contains a sodium based solution, Nature’s Own will go to work right away, softening water the salt free way. Nature’s Own will also eliminate some native sodium in water..Costco has a large and varied selection of water filtration systems that are sure to bring you the best tasting water possible. Shop bynd, capacity, or type, and select a water purification system that suits your family’s needs..While drinking hard water isn’t going to kill you, having a Costco water softener system in your home can help get rid of the negative qualities that it brings to you and your family. When it comes down to it, installing a filter or some other kind of system is a simple decision that can bring about many health benefits..