No, Universal’s Volcano Bay water theme park primarily uses chlorinated fresh water, not salt water. While some high-end resort pools use salt-water chlorination systems, the massive scale and intense filtration requirements of a theme park with dozens of high-speed slides and wave pools like the "Waturi Beach" make traditional chlorine-based systems more practical for maintaining strict health and safety standards. The water is also fully heated to at least 80 degrees Fahrenheit (27°C) year-round. Because of the high chlorine content, it is highly recommended to wear a waterproof sunscreen and consider using a leave-in hair conditioner or detangler, as the chemicals can be quite harsh on hair after a full day of swimming. If you are specifically looking for a salt-water experience at Universal Orlando, you would need to visit the pools at some of the on-site "Deluxe" hotels, such as the Hard Rock Hotel, which features a famous sand-bottomed, salt-water-compatible pool with underwater speakers.