AquaRite® 925 is designed to provide the same superior salt chlorination as the AquaRite® Item 15 while producing 25% more chlorine over its lifetime with the Extended Life TurboCell. The Extended Life Turbo Cell cuts your annual chlorine costs by 50% or more, to less than just $1 per pound. Soft, silky water for larger poolsl Replaces the need for chemical chlorine with healthy, non-toxic and odorless natural sodium chloride chlorine Non-aggressive, mild taste How Does Salt Chlorination Work? Step One: Water in your pool containing the proper amount of dissolved salt enters the TurboCell® Step Two: Power is applied to the Cell, converting dissolved salt into chlorine gas Step Three: The chlorine gas dissolves into the water Step Four: Water with pure, fresh chlorine is returned into the pool, satisfying 100% of your pool's chlorination needs