In other words, a "salt water" pool IS a chlorine pool. It uses a saltwater chlorine generator (SWCG) to generate chlorine from the chloride ions from the salt that was dissolved in the pool. When the chlorine gets used by killing a pathogen or oxidizing an organic or getting broken down by sunlight, it gets reverted back to chloride ion. So the SWCG can be thought of as using electricity to boost the energy of chloride to chlorine which then goes on to kill the nasties or oxidize bather waste or interact with sunlight in which cases its energy is given up and it reverts back to chloride salt.