SpaCare pH & Alkalinity Reducer 500g – Spa Chemical

Lowers pH and total alkalinity in spa and hot tub water to help maintain balanced water, protect spa surfaces and equipment, and support a more comfortable soaking environment.
SpaCare
SKU:
 
LC-REDU500
  $22.00
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Returns are free, there are no fees. We also make sure returns are easy to organize and processed promptly.

Satisfaction Guarantee

We stock quality pool and spa equipment and supplies from the most renowned manufacturers in Australia and the world and we are confident that you will be very pleased with your purchase. If for any reason you are not satisfied with a product, you are welcome to return it to us for a refund or exchange within 30 days of the purchase date. The refund will be issued to the full amount paid for the product including shipping.

Terms

  • You must contact us within 30 days of the date of purchase.
  • The product must be returned in good conditions.
  • Products damaged because of incorrect use, negligence or misuse will not be accepted.
  • All components, accessories and original packaging must be returned.
  • A copy of the original receipt must be included with the return.
  • Products must be shipped or returned to our Penrith NSW warehouse using a pre-paid label we will supply.

If you have any questions about our return policy, please contact us on 1300 766 619 or through our "contact us" form.

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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.

Balanced spa water for better comfort and easier ongoing care

Help Restore Balanced, More Comfortable Spa Water

  • Water Balance Icon

    Helps Restore Water Balance
    Lowers high pH and total alkalinity to help bring spa water back into the recommended range.

  • Stable Water Icon

    Supports More Stable Water Conditions
    Balanced pH and alkalinity help make spa water easier to manage as part of regular maintenance.

  • Spa Comfort Icon

    Improves Bather Comfort
    Balanced water helps create a more comfortable spa and hot tub experience.

  • Surface Protection Icon

    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.

  • Equipment Care Icon

    Helps Care for Spa Equipment
    Balanced water conditions help reduce the effects that high pH and alkalinity can have on spa equipment.

  • Daily Spa Care Icon

    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.

Balanced spa water with controlled pH and alkalinity

How to Use

  1. Test the spa water before treatment.
  2. Calculate the amount required based on spa volume and current reading.
  3. Dissolve the measured product in a bucket of water.
  4. Pour slowly into the water with the pump and filter operating.
  5. Circulate the water for 3 hours.
  6. 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.

SpaCare by Lo-Chlor – Comfort you can feel. Care you can trust.

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.
SKU LC-REDU500
GTIN 9312113021126
Barcode 65SCPAR500G
Package Length 11 cm
Package Width 11 cm
Package Height 24 cm
Brand SpaCare
Model pH & Alkalinity Reducer - 500g
Product Type Spa Chemical
Shipping Type Standard
Chemical Type Balancers
Chemical Function Alkalinity Down, pH Down
Active Constituents Sodium bisulphate: 1000g/kg
SpaCare pH & Alkalinity Reducer - Safety Data Sheet SpaCare pH & Alkalinity Reducer - Safety Data Sheet (572.56 kB)

Shipping

Same-day dispatch applies to orders received by 12.00 pm (AEST) during business days. Orders received after 12.00 pm and on weekends or public holidays will be dispatched on the next business day.

Delivery fees are $19.95 flat-rate per order Australia-wide, no matter how many products are in it. Orders containing bulky items like sand filters, acoustic boxes, heat pumps, pool covers, and pool slides may incur additional fees as they require specialized carriers.

Below are the estimated time to arrival in business days once an order is shipped.

Destination Sydney NSW VIC QLD SA WA/NT
Business Days 1 - 2 2 - 4 2 - 4 2 - 4 3 - 4 5 - 6

Rural and remote addresses, where delivery is not provided every day, may take longer.

Returns

Satisfaction Guarantee: If you are not satisfied with a product for any reason, you are welcome to return it to us for a full refund or exchange within 30 days of the purchase date - even if you have used the product. Returns are free, and we will cover return shipping.

We take full responsibility for the safe arrival of the products that you order from us. We will replace at our expense any product that arrives faulty, damaged during transit, or is the incorrect product. Click here for details

If you have any questions about our shipping policy or our return policy, please contact us on 1300 766 619 or through our contact us form.