Gel Hi-Soft 20 20 liter ion exchange cabinet water softenerGel Hi Soft 20 ion exchange cabinet water softener 20 litres Since 1979, Gel Spa has been dealing with water treatment, creating purification products that respect health and the environment and in order to provide solutions capable of managing the entire water cycle in compliance with the highest safety standards. Water softeners represent the right choice if you want to preserve your water system, ensuring constant sanitization and longevity;