Salt water pool - Purifier in alarm showing 93lbs of pool salt was required - Tech added ~50lbs and cleaned salt cell and reset alarm on control panel. After a few days of operation, low salt alarm enabled showing 53 lbs required. Went to store a bought a 40 lb bag of salt and added to pool and alarm automatically reset itself and has been operating now alarm free for 7 days - Tech should have added two bags of pool salt in lieu of a single bag at time of bi-weekly service.