Magnetic Water Softener-Medium Two Unit Combo- Protects Cold and Hot Water Lines Compare-The Heaviest, Most Magnets (8), Most Powerful Unit Available Under $275. Reduces minerals, calcium, lime scale in water causing hard water spots. A Set of Two Units to Treat Both Hot and Cold Water Lines for One Low Price. The very latest hydro-magnetic technology for water treatment. No salt no electricity needed. Installs in 120 seconds with no tools required. Anyone can install. No plumber needed.