How Do I Raise or Lower pH in a Hot Tub

To raise pH, use a pH increaser (sodium carbonate). To lower pH, use a pH decreaser (sodium bisulfate).

Why Is pH Balance Important in a Hot Tub?

The ideal pH range for a hot tub is between 7.4 and 7.6. Keeping your pH in this range offers several benefits:

• Prevents Corrosion: Balanced pH protects your hot tub’s pipes, heater, and jets from damage.

• Improves Sanitizer Efficiency: Chlorine and bromine work best in properly balanced water.

• Reduces Skin and Eye Irritation: Proper pH helps create a more comfortable soaking experience.

• Prevents Cloudy Water: Balanced pH improves water clarity and reduces buildup.

How to Test Your Hot Tub’s pH Level

Before adjusting your pH, it's important to test your water to know where your levels stand. Follow these steps:

1. Use Test Strips or a Digital Tester: Both methods provide accurate readings for pH, alkalinity, and sanitizer levels.

2. Dip the Test Strip in the Water: Hold it in the water for a few seconds, then compare the color to the chart on the packaging.

3. Check the pH Reading: If your pH is above 7.6, it’s too high. If it’s below 7.4, it’s too low.

How to Raise pH in a Hot Tub

If your pH is too low (below 7.4), it means your water is acidic. Acidic water can corrode hot tub components and cause discomfort for bathers.

Steps to Raise pH:

1. Add a pH Increaser: Products like sodium carbonate (soda ash) are designed to raise pH.

2. Measure the Correct Amount: Follow the manufacturer’s instructions based on your hot tub size.

3. Add the pH Increaser Gradually: Pour the solution into your hot tub while the jets are running to help it circulate.

4. Test the Water After 30 Minutes: Retest your water to ensure your pH is back in the ideal range.

Pro Tip: If your alkalinity is also low, correct that first with an alkalinity increaser. Alkalinity stabilizes pH levels.

How to Lower pH in a Hot Tub

If your pH is too high (above 7.6), it means your water is too basic. This can lead to cloudy water, scale buildup, and reduced sanitizer effectiveness.

Steps to Lower pH:

1. Add a pH Decreaser: Common options include sodium bisulfate or muriatic acid.

2. Follow Dosage Instructions: Adding too much can drastically drop your pH, so apply gradually.

3. Pour the Decreaser Slowly: Add the solution to your hot tub while the jets are running.

4. Test the Water After 30 Minutes: Retest your water to ensure the pH has returned to normal.

Signs Your Hot Tub’s pH Is Too High or Too Low

Knowing when your pH is off can save you time and prevent water issues. Watch for these signs:

When pH is Too Low:

• Corroded metal parts or fixtures

• Skin and eye irritation

• A strong chlorine smell

When pH is Too High:

• Cloudy water

• White scale buildup on surfaces

• Dry, itchy skin after soaking

Tips for Maintaining Balanced pH Levels

• Test Your Water Weekly: Frequent testing helps you stay ahead of pH imbalances.

• Monitor Alkalinity Levels: Alkalinity acts as a buffer, stabilizing pH. Keep alkalinity between 80-120 ppm.

• Shower Before Entering: This helps reduce oils, soaps, and lotions that can affect pH.

• Avoid Overusing Chemicals: Too many adjustments can swing your pH levels too far.

What If My pH Keeps Fluctuating?

If you find your pH constantly rising or falling, consider these factors:

• Old Water: Water that hasn’t been changed in several months may struggle to maintain balance.

• Dirty Filter: A clogged filter can trap contaminants that alter pH levels.

• Heavy Hot Tub Use: Frequent soaking can introduce more oils, sweat, and debris, impacting pH.

When to Drain and Refill Your Hot Tub

If adjusting chemicals doesn’t resolve persistent pH problems, draining and refilling your hot tub may be the best solution. Fresh water provides a clean slate for properly balancing chemicals.

Balancing your hot tub's pH is key to maintaining clear, safe water and protecting your equipment. By testing regularly and following these steps, you can enjoy a relaxing soak without the hassle of cloudy or uncomfortable water.