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Salt water chlorination is a process that uses dissolved salt (2,500–6,000 ppm) as a store for the chlorination system. The chlorine generator (also known as salt cell, salt generator, salt chlorinator or SWG) uses electrolysis in the presence of dissolved salt (NaCl) to produce chlorine gas (Cl2) or its dissolved forms -hypochlorous acid (HClO) / sodium hypochlorite (NaClO)- which is the sanitizing agent already commonly used in swimming pools. Hydrogen is produced as byproduct too. As such, a saltwater pool is not actually chlorine-free; it simply utilises added salt and a chlorine generator instead of direct addition of chlorine. Distinction from Traditional Pool Chlorination...

What is a Robotic Pool Cleaner? A Robotic Pool Cleaner is an automated vacuum cleaner whose sole purpose is to collect debris, sediment, and algae from swimming pools with little human intervention. They are electrical powered without interfering the filter system, no need to hook up any hose to anything. It has built in filter to collect debris and dirt which can dramatically cut down the filter back wash. Unlike pressure side cleaner which requires a booster pump. Big electrical bill makes such cleaner less and less favorable. Electrical robotic pool cleaner runs on plug in electricity which cost pennies...