Add to your wash for whiter, brighter clothes. Calgon® Water Softener gets clothes cleaner than detergent alone! Calgon® Water Softener boosts the power of your laundry detergent by removing hard water minerals which trap dirt into fabric fibers. Plus, it removes detergent build-up and soap scum that cause clothing to appear dull and faded. That's why, when you add Calgon Water Softener along with detergent, whites look really white and colors are brighter without bleach.