Why pH Matters in Saltwater Pools

At Sakon SwimmingPool, every pool we build and service uses a saltwater system. Saltwater pools are popular because they feel soft on the skin, are easier to maintain than chlorine powder systems, and provide crystal-clear water.

But one thing you must always control is the pH level. For saltwater pools, the ideal pH range is 7.2–7.6. If pH goes too high or too low, your water quality, equipment, and comfort will suffer.

Why Low pH Is Bad in Saltwater Pools

Low pH means the pool water is acidic. It’s less common in saltwater pools, but it can happen if too much acid is added during treatment. Problems include:

• Irritation for swimmers – Low pH water stings the eyes, dries out skin, and makes swimming uncomfortable.

• Corrosion of equipment – Acidic water damages ladders, lights, pumps, and even the titanium plates in your salt cell.

• Tile and grout damage – Over time, acidic water wears down grout and concrete finishes.

• Chlorine loss – Chlorine produced by your salt cell burns off too quickly, leaving less protection against bacteria.

  
  

Ideal pH Range for Saltwater Pools (7.2–7.6)

Why High pH Is a Bigger Problem in Saltwater Pools

Saltwater pools naturally drift towards high pH. This happens because the salt cell generates chlorine through electrolysis, which increases alkalinity. If pH climbs above 7.8, here’s what you’ll notice:

• Weak chlorine – Even though your salt cell is working, the chlorine becomes far less effective. Algae and bacteria can survive.

• Cloudy water – Minerals like calcium start to settle out, making your water look dull and dirty.

• Scaling and deposits – White chalky scale forms on tiles, pool lights, and worst of all, inside the salt cell itself. This shortens the cell’s life and reduces efficiency.

• Uncomfortable swimming – High pH leaves water feeling “hard” and can dry out the skin.

The Perfect Balance – 7.2 to 7.6

Keeping your pH in the right range gives you:

• Safe, clear, and soft water.

• Chlorine that works at full strength.

• Longer life for your pump system, filters, and salt cell.

• Less money spent on chemicals and repairs.

✅ Pro Tip from Sakon SwimmingPool Saltwater pools in Thailand’s hot climate often drift high in pH. Test your pool water at least once a week and adjust with a little pool acid when needed. Regular pool maintenance in Isaan is the key to crystal-clear water, healthy swimming, and long-lasting equipment.