Check your sanitizer level. Chlorine should be in the 2 – 4 ppm range and Bromine in the 3 – 5 ppm range. Once you have your pH and sanitizer in the proper range, add Serum Total Maintenance at the rate of 1 oz. per 100 gallons per week.
Let me note that Total Maintenance assists in keeping your spa water clear in 2 ways. It is both a highly effective secondary sanitizer and a very effective pH buffer. Total Maintenance takes some of the sanitizing load off your primary sanitizer and, by keeping your spa water pH in the proper range, it ensures that chlorine can do its job.