Just to clarify, a "salt water pool" is most definitely NOT chlorine free. They use a chlorine generator to create chlorine from the salt water. We have a salt water pool at home. The benefit to them is that the chlorine supply is constant so there is rarely an overdose of chlorine and rarely an underdose. It's much more stable. It does seem to feel better and less harsh, but I think that is due to having the "proper" level rather than an overdose of chlorine. It's still chlorinated water.