1.8 Water Chemistry Abbreviations / Acronyms & Ranges
| ABBREVIATION/ACRONYMS | DEFINITION | CORRECT CHEMICAL LEVELS |
| CH | Calcium Hardness | 50 – 150 ppm |
| TA | Total Alkalinity | 80-100 ppm |
| pH | Potential Hydrogen | 7.2 – 7.6 ppm |
| ORP | Oxidation–Reduction Potential |
545 – 550 mV Spa Boy Optimum Range. (Optimum Range is the default factory setting, the user may adjust higher if preferred by contacting their dealer to have it adjusted). Depending on the water chemistry which will be effected by bather load and spa usage, at times the ORP value will overshoot or undershoot the Optimum Range. Note: Using a Drop Test Kit, a 0.5ppm Chlorine reading = approximately 550mV |