Why Decrease Hot Tub pH? Did you know that the water in your spa should be maintained at a pH of 7.2 to 7.8 and total alkalinity from 80 to 140 ppm? Using a pH down for hot tub or spa pH decreaser will help you maintain your hot tub chemistry. pH Down For Hot Tub Spas - AquaDoc's spa pH reducer helps you maintain the balance of your hot tub's chemistry. If your spa's pH measure is outside its range, it is important to use a pH decreaser to help reduce cloudy water, scale build-up, and more. Spa pH Decreaser for Balanced Water - Unbalanced pH can lead to cloudy water and reduce your spa’s performance. High pH levels may also cause scaling or affect your pump and filter over time. Support Effective Sanitization - High pH levels can reduce the effectiveness of your sanitizer and may cause discomfort. Use our hot tub pH reducer to keep your spa water clean and comfortable. pH Decreaser For Hot Tub Made In The USA - At AquaDoc, we make high-quality spa chemicals to help balance your hot tub and spa chemistry and treat them with care. When you choose AquaDoc, you are getting consistent quality.