Lower High pH and Alkalinity for Better Balanced Spa Water
SpaCare pH & Alkalinity Reducer is formulated to lower pH and total alkalinity in spa and hot tub water, helping restore balanced water conditions when levels are too high.
Water high in pH and total alkalinity can affect overall water balance and make spa water less comfortable to manage. Keeping these levels in range helps maintain a cleaner, more stable spa environment and supports better day-to-day water care.
Made from sodium bisulphate, this easy-to-use formula is ideal for use when testing shows pH or total alkalinity is above the recommended spa range.
Help Restore Balanced, More Comfortable Spa Water
Helps Restore Water Balance
Lowers high pH and total alkalinity to help bring spa water back into the recommended range.
Supports More Stable Water Conditions
Balanced pH and alkalinity help make spa water easier to manage as part of regular maintenance.
Improves Bather Comfort
Balanced water helps create a more comfortable spa and hot tub experience.
Helps Reduce Scale and Staining Risk
Keeping pH and alkalinity within range helps reduce the conditions that can contribute to scale formation and metal staining.
Helps Care for Spa Equipment
Balanced water conditions help reduce the effects that high pH and alkalinity can have on spa equipment.
Fits into Regular Spa Care
Simple testing and measured dosing helps keep spa water balanced between uses.
How It Works
When pH and total alkalinity rise too high, spa water can move outside the recommended range and become harder to keep in balance.
SpaCare pH & Alkalinity Reducer adds sodium bisulphate to the water to lower pH and total alkalinity, helping return the water toward the ideal spa range for more balanced ongoing care.
How to Use
- Test the spa water before treatment.
- Calculate the amount required based on spa volume and current reading.
- Dissolve the measured product in a bucket of water.
- Pour slowly into the water with the pump and filter operating.
- Circulate the water for 3 hours.
- Re-test the water and repeat if necessary.
Dosage & Coverage
- Total Alkalinity: Add 24g per 1,000 litres of water to lower total alkalinity by 10ppm.
Important Usage & Compatibility Information
- Always test spa water before adding product.
- Maintain pH in the range of 7.2–7.6.
- Maintain total alkalinity between 125ppm and 150ppm.
- Do not add more than 25g per 1,000 litres of water at any one time.
- Always adjust total alkalinity before adjusting pH.
- Dissolve in a bucket of water before adding to the spa.
- Do not overdose.
Specialised Care for Spas and Hot Tubs
SpaCare by Lo-Chlor is created for the unique needs of spas and hot tubs, where warm water and frequent use demand a more specialised approach to water care.
From water balance and sanitising support to surface care and system cleaning, the SpaCare range works together to help keep your spa clear, comfortable, and inviting.
It is a trusted care system that makes ongoing maintenance feel simpler, so you can spend less time managing your water and more time enjoying it.
Frequently Asked Questions
Why are high pH and total alkalinity a problem in a spa or hot tub?
When pH and total alkalinity are too high, spa water can become harder to manage and less comfortable to use. They can also contribute to scale formation and metal staining, affect spa equipment and surfaces, and reduce how effectively chlorine works against algae and bacteria.
What happens if total alkalinity is too high?
High total alkalinity can make spa water harder to adjust accurately and can contribute to ongoing water balance issues. Lowering it toward the recommended range helps make maintenance more consistent.
Why should total alkalinity be adjusted before pH?
Total alkalinity affects how stable the pH is. Adjusting alkalinity first helps create a better starting point for bringing pH back into range.
Can I add a large amount at once if my reading is very high?
No. Do not add more than 25g per 1,000 litres of water at any one time. Make corrections gradually, then re-test after circulation.
Why do I need to dissolve it in a bucket first?
Pre-dissolving helps the product distribute more evenly through the spa water during treatment.
What should I do if the reading is still high after treatment?
After circulating the water for 3 hours, re-test the spa water. If the reading is still above range, a further measured adjustment may be needed.
How do I know when to use pH & Alkalinity Reducer instead of the Increaser?
Use the Reducer when testing shows pH or total alkalinity is above the recommended range. If readings are below range, the Increaser is the more suitable product.
