Maintaining proper pH levels in a hot tub is essential for ensuring the water remains clean and clear. The ideal pH range for hot tub water is between 7.2 and 7.8. To balance the pH levels, a pH increaser or decreaser may be needed, depending on whether the pH is too high or too low. It is important to follow the manufacturer's instructions for adding these chemicals, and to test the water regularly to ensure the pH levels remain within the proper range.