It depends on where you are taking the water from. Always test the water with test strips. Add other chemicals if you need to balance the pH level or total alkalinity or calcium hardness. You can check with pool chemical dealers. If you add other chemicals to the water, it will have no effect on the salt in the hot tub. However, always avoid scented oils, fragrances, perfumes and the like that can damage the motor system of the hot tub.
Do I need to use any other chemicals in my hot tub with a disinfection system (saltwater system) besides salt? What happens if I put other chemicals in the hot tub?
Do I need to use any other chemicals in my hot tub with a disinfection system (saltwater system) besides salt? What happens if I put other chemicals in the hot tub?