Managing Total Dissolved Solids (TDS) in Swimming Pool Water

Traditional Chlorine-Treated Pools

• Optimal TDS Level: Below 1500 parts per million (ppm).
• Issues with High TDS:
  • Above 1500 ppm: Water becomes unmanageable.
  • Between 1500-2500 ppm: Increased chlorine usage and reduced effectiveness of chemical treatments.
  • Consider partial draining and refilling when TDS exceeds 1500 ppm to restore balance.
• Initial TDS Levels:
  • Fresh supply water often starts at 500 ppm or more.
  • Chemical treatments increase TDS quickly.

Saltwater Pools

• Initial TDS Levels:
  • Start at 3500 ppm due to the salt content required for the salt system to function.
  • The typical guideline of 1500-2500 ppm does not apply.
• Managing TDS:
  • Consider partial drainage when TDS increases by 1000-1500 ppm above the starting level.
  • After drainage, rebalance salt levels as draining removes significant salt content.
  • Requires hundreds of pounds of salt to maintain necessary ppm for saltwater systems.

Special Considerations

• Water Restrictions:
  • In areas with water restrictions, frequent draining and refilling may not be feasible.
• General Advice:
  • Regular monitoring of TDS is essential to maintain pool water quality.
  • Adjust management practices according to pool type and local regulations.

Additional Resources

• Check out swimmingpoolsteve.com for more information.
• Consider subscribing to relevant YouTube channels for ongoing advice and tips.