Our pool (Bella Vita, a 12,500-gallon saltwater pool with a Hayward AquaRite salt cell) sits a short walk from the Gulf, and if you'd asked us before we started logging every test, we'd have guessed our biggest chemistry problem would be chlorine. In practice, the number that fights us hardest is pH — it climbs on its own, repeatedly, and our own logged data shows exactly how often.
A salt chlorine generator doesn't add chlorine from a jug — it runs electricity through dissolved salt (sodium chloride) to produce chlorine on demand. That reaction's byproduct is sodium hydroxide, a base, which is released into the water right along with the chlorine. Run a salt cell long enough and the water trends upward in pH almost by design, independent of anything else happening in the pool.
We didn't just take that mechanism on faith — we checked it against our own test history. Of 64 logged pH readings between July 3 and September 1, 2026, 17 of them — about 27% — came in at 7.8 or higher, above the 7.2–7.6 range most pool guidance treats as the target band.
That's not one bad week — it's spread across the whole stretch we've been logging, which is consistent with a steady mechanical push (the salt cell) rather than a one-off event like a heavy rain or a chemical mistake.
Total alkalinity (TA) acts as a buffer that resists pH changes — including the change you actually want when you add acid. A pool sitting on the high side of the TA range will fight back against acid additions and drift back up faster afterward, sometimes called "pH bounce." Excluding one clear same-day outlier test, our logged TA readings from August 14 through September 1 ran between 90 and 130 ppm across ten separate tests — at or above the upper end of the commonly recommended 80–120 ppm range every time.
Put together, a salt cell that generates a base as a byproduct and a TA that's routinely running high is a combination that keeps nudging pH upward from two directions at once — which matches what we actually see in the water, not just in theory.
We can't log wind or humidity the way we log water chemistry, but the coastal setting isn't neutral either: a pool that gets more wave-like agitation from wind (or from waterfall/spillover features) off-gasses dissolved CO2 faster, and less dissolved CO2 in water also pushes pH higher. It's a smaller, harder-to-isolate factor next to the salt cell itself, but it points the same direction rather than fighting it.
None of this means the pool is being run wrong — it means acid (we use muriatic acid) is a routine, expected part of maintaining a coastal saltwater pool, not a sign something's off. We test pH regularly through peak summer specifically because of this drift, and we'd rather catch it with a small correction than let it run to where it starts affecting chlorine effectiveness and scale risk. If you're weighing storm-season prep too, see our hurricane season pool prep notes, which pull from this same log.
This page reflects one homeowner's real, logged experience maintaining a residential saltwater pool on the Florida Panhandle coast. It is not professional pool-service advice, and every pool's chemistry, equipment, and environment differ — test your own water rather than assuming these numbers apply directly to your pool.