Calcium Balance for Better Spa Care
AquaSpa Calcium Hardness Enhancer is the calcium-balance step in the AquaSpa chlorine-free and bromine-free spa system, used when calcium hardness needs to be raised to support more balanced, better-protected spa water.
When calcium hardness is too low, the water can become more aggressive to spa surfaces and equipment, making overall water balance harder to maintain over time. AquaSpa Calcium Hardness Enhancer helps restore the calcium level needed for steadier water conditions and more reliable day-to-day AquaSpa care.
Why This Balance Step Matters
Helps raise low calcium hardness
Used when testing shows calcium hardness has fallen below the recommended range and needs correction.
Supports better water balance
Calcium hardness is an important part of achieving more stable, better-managed spa water.
Helps protect surfaces and equipment
Water that is too low in calcium can contribute to equipment corrosion and may affect concrete and grouted spa finishes.
Supports a more comfortable spa environment
Balanced calcium hardness helps support steadier, more settled water conditions for regular spa use.
Quality formula for clearer water
Made with quality food-grade material to support calcium balance without clouding the spa.
Supports balanced AquaSpa care
Works alongside sanitising, shock treatment, and other balancers when water needs correcting.
How It Works
AquaSpa Calcium Hardness Enhancer raises calcium hardness in spa and hot tub water using calcium chloride. In the AquaSpa system, calcium hardness is an important part of overall water balance and helps support more stable conditions in the water.
When calcium hardness is too low, the water can become more aggressive and may contribute to equipment corrosion, etching of concrete and grouted surfaces, and less settled overall balance. AquaSpa Calcium Hardness Enhancer is used to restore the calcium level so the water remains better balanced and more suitable for ongoing AquaSpa care.
How to Use
- Test the spa water before dosing.
- Calculate the correct spa volume.
- Ensure the filtration pump is running.
- Add AquaSpa Calcium Hardness Enhancer to the spa water at the required dose.
- Leave the cover off for at least 30 minutes after dosing.
- Retest the water before making further adjustments.
Dosage & Coverage
- Dosage: To raise calcium hardness by 10ppm, add 10g per 1,000 litres
Important Usage Information
- Use AquaSpa Calcium Hardness Enhancer only when testing shows calcium hardness needs to be raised.
- Test the water before adding and retest after circulation before making further adjustments.
- Add chemicals to water and never water to chemicals, and do not overdose.
- If adding other AquaSpa products, allow 30-minute intervals between each chemical addition.
Calcium hardness should generally be maintained between 200–275ppm for concrete and tiled spas and hot tubs, and between 175–225ppm for other surfaces. AquaSpa Calcium Hardness Enhancer is part of overall water balance management and does not replace sanitising, shock treatment, filtration care, or other balancing steps where required.
The AquaSpa Chlorine-Free Spa Experience
AquaSpa by Lo-Chlor offers a different way to care for spas and hot tubs, built around a chlorine-free and bromine-free system that supports healthy, sparkling water with a gentler feel.
Proudly Australian and manufactured for local spa conditions, the AquaSpa range is created for spa owners who want comfort, freshness, and simpler weekly care. It works as a complete system to help maintain a more enjoyable soaking environment without the usual harshness associated with traditional sanitising methods.
From ongoing sanitising and oxidation to water clarity, balance, and system care, AquaSpa brings each part of spa maintenance together in a way that feels easier, more comfortable, and more rewarding to live with.
Frequently Asked Questions
When should I use AquaSpa Calcium Hardness Enhancer?
Use it when testing shows calcium hardness in your spa or hot tub is too low and needs to be brought back into range.
Why does low calcium hardness matter in a spa?
Water that is too low in calcium can become more aggressive, which may contribute to equipment corrosion and may affect concrete and grouted spa surfaces over time.
Do I need to test the water before adding AquaSpa Calcium Hardness Enhancer?
Yes. AquaSpa Calcium Hardness Enhancer should be added only after testing confirms that calcium hardness is below the recommended range.
What calcium hardness level should I aim for?
Calcium hardness should generally be maintained between 200–275ppm for concrete and tiled spas and hot tubs, and between 175–225ppm for other surfaces.
Can low calcium hardness affect spa surfaces or equipment?
Yes. Low calcium hardness can contribute to equipment corrosion and may etch concrete and grouted spa finishes if it is left uncorrected.
Can I add AquaSpa Calcium Hardness Enhancer with other AquaSpa products on the same day?
Yes. Keep the filtration pump running, leave the cover off, and allow 30-minute intervals between each chemical addition.
