AquaDoc Spa pH Up & Down – pH Balancer for Indoor & Outdoor Spas – Easy Water Maintenance to Raise or Lower pH Levels and Keep Spa Water Clean, Clear & ComfortableBrand: MAV AquaDoc Features: Why Maintain 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 a total alkalinity of 80 to 140 ppm? Using pH Increaser & Decreaser for spas helps maintain your hot tub chemistry effectively. pH Up & Down For Hot Tub Spa Our pH Increaser and Decreaser for hot tub kit helps maintain your hot tub chemistry balance. If your spa's pH measure is below its range, use our hot tub