Zodiac Group began as France's premiere designer of mechanically propelled balloons and inflatable boats. Today, the Zodiac name extends to Zodiac Pool Care - the inventors and manufacturers of swimming pool products and cleaners including the Nature2 mineral purification system and the Nature2 Express mineral sanitization system. Nature2 cleans pool water using minerals to both eliminate bacteria and lessen the amount of chlorine required overall. Nature2 Express, another mineral pool cleaner, houses minerals in a cartridge and sanitizes the pool's water by also eliminating bacteria and lessening the need for chlorine. Nature2 products cost about $130 online. The cartridge for Nature2 Express is approximately $70.