Why Alkalinity Matters

Total alkalinity stabilizes pH in your spa or hot tub. Low alkalinity can cause pH swings and corrosion. High alkalinity can create cloudy water and scaling. Proper balance keeps water safe and equipment protected.

Testing Alkalinity

Use a test kit to measure alkalinity weekly. Ideal range is 80–120 ppm for most hot tubs. Consistent testing helps prevent sudden water problems.

Adjusting Alkalinity

Add alkalinity increaser to raise levels, or acid to lower them if too high. Adjust slowly and retest after a few hours of circulation. Never mix chemicals directly in the spa water.

Tips for Maintenance

Balancing alkalinity prevents damage to pumps, heaters, and filters. It also improves sanitizer efficiency. Keep a record of readings to track trends and anticipate adjustments.

Regularly balancing alkalinity ensures your spa or hot tub water stays clear, safe, and comfortable. Combined with proper pH management, it maintains a relaxing, worry-free soak.