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Why Is My pH Level Constantly High or Low?
- Spa Fuel
- Jun 3
- 2 min read
Why Is My pH Level Constantly High or Low?
If you're finding that your hot tub’s pH level keeps drifting too high or too low, even after adjusting it, you're not alone—this is a common issue for many spa owners. Understanding the cause can help you take control and maintain a better balance in your water.
Common Reasons for Fluctuating pH Levels:
1. Bather Load & Products
Body oils, lotions, perfumes, and even sweat can alter your water’s pH. The more people using your spa, the more impact on your water chemistry—especially if they’re not rinsing off before getting in.
2. Source Water
The pH of your tap water varies depending on where you live. If you’re filling from a source with naturally high or low pH, you’ll need to manage this from the start with the right balancing products.
3. Unbalanced Alkalinity
Total Alkalinity acts like a buffer for pH. If it's too low, your pH will swing dramatically. If it's too high, it can lock your pH in an unwanted range. Always balance alkalinity first before adjusting pH.
4. Inconsistent Chemical Use
Adding too much pH increaser or reducer can lead to a see-saw effect. Use small, measured amounts and allow time between adjustments for accurate results.
5. Old or Stressed Water
Over time, hot tub water absorbs dissolved solids that make it harder to manage. If your water is overworked or hasn’t been changed in a while, it might be time for a drain, flush, and refill.
Spa Fuel PRO Tip:
Use your LaMotte test strips regularly and match the colours to your Spa Fuel pH Increaser or Reducer packaging. Our colour-coded system takes the guesswork out of balancing and makes it easier to spot when your water is off track.
Consistent testing, correct order of adjustments, and quality products like Spa Fuel essentials are the key to keeping your pH in check—and your hot tub water feeling just right.
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