03/06/2026
๐๐๐๐๐๐๐๐๐ ๐๐๐ ๐๐๐ ๐๐๐ ๐๐๐๐๐๐๐๐๐ ๐๐๐๐: ๐๐๐๐ ๐๐. ๐๐
Salt systems are brilliant because they use a relatively low concentration of salt (usually around 1,500 to 1,750 ppm, which is less than a human tear) to create a steady stream of pure chlorine.
However, even the most advanced salt cell is at the mercy of pH levels. In a hot tub, pH is the "anchor" for your water chemistry. If that anchor drags, everything else goes sideways.
๐๐๐ซ๐ ๐ข๐ฌ ๐ฐ๐ก๐๐ญ ๐ก๐๐ฉ๐ฉ๐๐ง๐ฌ ๐ฐ๐ก๐๐ง ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ ๐๐๐๐ข๐๐๐ฌ ๐ญ๐จ ๐ ๐จ ๐ซ๐จ๐ ๐ฎ๐.
๐ When pH is Too Low (Acidic: Below 7.2)
Low pH is essentially "hungry" water. It is aggressive and seeks to neutralize itself by eating whatever it touches.
๐พ๐ค๐ง๐ง๐ค๐จ๐๐ค๐ฃ ๐ค๐ ๐พ๐ค๐ข๐ฅ๐ค๐ฃ๐๐ฃ๐ฉ๐จ: This is the big one. Acidic water eats away at the metal in your heater element, pump seals, and internal plumbing. In a salt system, this can lead to premature failure of the expensive electrolytic cell.
๐๐ช๐ง๐๐๐๐ ๐๐ฉ๐๐๐๐ฃ๐: If your tub has any stone or plaster elements, low pH will physically pit and dissolve them.
๐๐๐ "๐๐ฉ๐๐" ๐๐๐๐ฉ๐ค๐ง: Acidic water strips the natural oils from your skin and hair, leading to "hot tub itch," red eyes, and that uncomfortable "squeaky" feeling on your skin.
๐พ๐๐ก๐ค๐ง๐๐ฃ๐ ๐ฝ๐ช๐ง๐ฃ-๐ค๐๐: While low pH actually makes chlorine more active, it also makes it much less stable, meaning your salt cell has to work overtime to keep up.
๐ When pH is Too High (Alkaline: Above 7.8)
High pH is "lazy" water. Itโs over-saturated and looking to dump its excess minerals onto your equipment.
๐๐๐๐ก๐๐ฃ๐ ๐๐ฃ๐ ๐พ๐๐ก๐๐๐ช๐ข ๐ฝ๐ช๐๐ก๐๐ช๐ฅ: High pH causes calcium to fall out of suspension. This creates a "sandpaper" texture on the tub walls and, more dangerously, clogs the internal plates of your salt cell with white crust. This can kill the cell's ability to produce chlorine entirely.
๐พ๐ก๐ค๐ช๐๐ฎ, "๐๐๐ก๐ ๐ฎ" ๐๐๐ฉ๐๐ง: High pH is the #1 cause of that mysterious fog in your water. No matter how much chlorine you add, the water won't clear until the pH is lowered.
๐๐ฎ๐ ๐๐ฃ๐ ๐๐ ๐๐ฃ ๐๐ง๐ง๐๐ฉ๐๐ฉ๐๐ค๐ฃ: Surprisingly, high pH causes just as much stinging as low pH because it interferes with the moisture barrier of your eyes.
๐๐ก๐ฒ ๐๐๐ฅ๐ญ ๐๐ฒ๐ฌ๐ญ๐๐ฆ๐ฌ ๐๐ญ๐ซ๐ฎ๐ ๐ ๐ฅ๐ ๐ฐ๐ข๐ญ๐ก ๐ฉ๐
Salt systems have a natural tendency to drive pH up. The process of electrolysis (splitting salt into chlorine) creates a byproduct called sodium hydroxide, which is highly alkaline.
The Golden Rule: In a salt hot tub, you will spend significantly more time adding "pH Down" (sodium bisulfate) than you will adding "pH Up."
๐๐ก๐ "๐๐จ๐ฅ๐๐ข๐ฅ๐จ๐๐ค๐ฌ" ๐๐จ๐ง๐
To keep your salt cell healthy and your skin happy, aim for the following:
Ideal pH: 7.4 to 7.6
Total Alkalinity: 80 to 120 ppm (this acts as a "shield" to prevent pH from bouncing).
๐๐๐๐ฉ๐ข๐ง๐ ๐ฒ๐จ๐ฎ๐ซ ๐ฉ๐ ๐๐๐ฅ๐๐ง๐๐๐ ๐๐จ๐๐ฌ๐ง'๐ญ ๐ฃ๐ฎ๐ฌ๐ญ ๐ฉ๐ซ๐จ๐ญ๐๐๐ญ ๐ฒ๐จ๐ฎ๐ซ ๐ข๐ง๐ฏ๐๐ฌ๐ญ๐ฆ๐๐ง๐ญโ๐ข๐ญ ๐๐ง๐ฌ๐ฎ๐ซ๐๐ฌ ๐ฒ๐จ๐ฎ๐ซ "๐ซ๐๐๐จ๐ฏ๐๐ซ๐ฒ ๐ฌ๐จ๐๐ค" ๐๐๐ญ๐ฎ๐๐ฅ๐ฅ๐ฒ ๐๐๐๐ฅ๐ฌ ๐ฅ๐ข๐ค๐ ๐จ๐ง๐.
