pH Down: Spa pH Decreaser

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HTH spa™ pH Down helps you take control of your spa water with confidence.

  • This powerful spa pH down formula lowers high pH levels to restore balance, clarity, and comfort to your hot tub.
  • By optimizing water chemistry, it enhances sanitizer performance, prevents scale buildup, and reduces skin and eye irritation.
  • Compatible with all spa types including bromine, chlorine, and biguanide systems.

HTH spa™ pH Down simplifies water care for a soothing, worry-free spa experiences every time. Hot Tub balancing made simple!

Contains mineral crystals

HTH spa™ pH Down is formulated to provide a more relaxing spa experience.

Compatible with all spas

HTH spa™ pH Down is great for all spas, including bromine, chlorine and biguanide.

You’re all clear with HTH™

For best results, use HTH spa™ Test Strips twice a week to test, and use our spa pH decreaser to balance and maintain total pH levels between 7.2 and 7.8 ppm.

How to use

HTH spa™ Care pH Down: Spa pH Decreaser

1. Test Your Spa Water

Use HTH spa™ Test Strips to test your spa water twice weekly. pH levels should be maintained between 7.2 and 7.8 ppm.

Use HTH spa™ Test Strips to test your spa water twice weekly. pH levels should be maintained between 7.2 and 7.8 ppm.

2. Apply HTH spa™ pH Down

If the pH level measures above 7.8 ppm, apply pH Down directly to the filter skimmer with the spa circulation system running. Refer to the on-pack chart for correct dosage.

If the pH level measures above 7.8 ppm, apply pH Down directly to the filter skimmer with the spa circulation system running. Refer to the on-pack chart for correct dosage.

3. Re-check pH Levels

After the spa circulation system has been running for 30 minutes, re-test pH and add more pH Down if necessary.

After the spa circulation system has been running for 30 minutes, re-test pH and add more pH Down if necessary.