How do you maintain swim spa water?

The routine is the same as a hot tub, just applied to a much larger volume of water — which actually makes chemistry a bit more stable, not less. A typical schedule: - **2-3 times per week:** Test sanitizer (chlorine or bromine), pH, and alkalinity. Adjust as needed. Because swim spas run cooler than hot tubs, sanitizer burns off more slowly. - **Weekly:** Rinse the filter cartridges and wipe the waterline. - **Monthly:** Deep clean filters with a cartridge cleaner; inspect the cover for waterlogging. - **Every 4-6 months:** Drain, flush the plumbing, clean the shell, and refill. Heavy-use households drain more often. Saltwater sanitizing systems are common on swim spas and reduce hands-on chemical dosing, though they do not eliminate testing. Budget roughly $30-$60 a month for chemicals and filter replacement.