Our Salt Cell Protector Plus reduces and softens deposits on your salt chlorinator cells. This innovative product increases the chloride concentration in water - enhancing chlorine production. With the addition of our one gallon of Salt Cell Plus to a 15,000 gallon pool results is an increase in hardness of approximately 100 parts per million. One gallon treats 15,000 gallons of pool water. This Salt Cell Protector does not contain sulphates. Sulphates can attack cement and grout. Salt Cell Protector also helps protect marble sheen and quartz on surfaces from scaling. Easy to use - just add directly to the pool. Lasts six months. To clean badly caked cells use LO-CHLOR Clean Cell.