Genuine Acti Spa Alkalinity Increaser 1KG
£14.00
Genuine Acti Spa Alkalinity Increaser 1KG
Genuine Acti Spa Alkalinity Increaser 1KG is a reliable water treatment chemical designed to raise and stabilise total alkalinity levels in hot tubs and spas. Maintaining the correct alkalinity balance helps prevent pH fluctuations, protects spa equipment from corrosion, and ensures comfortable bathing conditions.
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Genuine Acti spa water balancing chemical
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Raises and stabilises total alkalinity levels
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Helps prevent pH fluctuations and unstable water chemistry
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Protects spa components from corrosion and damage
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Suitable for hot tubs and spas
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Supports balanced, comfortable spa water
If you have any questions, please call our shop on 01268 776690 — we’re always happy to help. Thank you for choosing CrystalClear Leisure.
Genuine Acti Spa Alkalinity Increaser 1KG
Genuine Acti Spa Alkalinity Increaser 1KG is an essential water treatment chemical designed to raise and stabilise total alkalinity levels in hot tubs and spas. Maintaining the correct alkalinity balance is crucial for stable water chemistry, comfortable bathing conditions, and long-term protection of spa equipment.
Low total alkalinity can cause unstable pH levels, leading to water that becomes corrosive, uncomfortable for bathers, and damaging to pumps, heaters, and other spa components. Genuine Acti Spa Alkalinity Increaser 1KG helps restore proper alkalinity balance, allowing pH levels to remain stable and ensuring your spa water stays clean, safe, and easy to maintain.
By regularly testing and adjusting alkalinity levels using Genuine Acti Spa Alkalinity Increaser 1KG, you can maintain a balanced spa environment, improve water stability, and protect your spa system from unnecessary wear.
Key Features
Raises Total Alkalinity
Genuine Acti Spa Alkalinity Increaser 1KG is specifically formulated to increase total alkalinity levels in spa and hot tub water. Proper alkalinity helps maintain balanced water chemistry and prevents rapid pH fluctuations.
Stabilises pH Levels
When total alkalinity is too low, pH levels can swing unpredictably. Genuine Acti Spa Alkalinity Increaser 1KG helps stabilise pH, making ongoing water maintenance easier and more reliable.
Prevents Corrosion
Low alkalinity water can become corrosive and may damage heaters, pumps, seals, pipework, and spa surfaces. Maintaining correct alkalinity levels helps protect spa equipment and extend its lifespan.
Maintains Ideal Water Balance
Regular use of Genuine Acti Spa Alkalinity Increaser 1KG helps keep your spa water within the recommended alkalinity range, promoting comfortable bathing conditions and consistent sanitiser performance.
Recommended Total Alkalinity Range
For spas and hot tubs, the recommended total alkalinity (TA) level is:
80 – 150 mg/l (ppm)
Maintaining alkalinity within this range helps prevent pH instability and ensures effective water treatment.
If alkalinity falls below this range, Genuine Acti Spa Alkalinity Increaser 1KG should be used to restore proper balance.
Dose Rates
| Water Volume | To Increase Total Alkalinity by 10 mg/l (ppm) | To Increase Total Alkalinity by 25 mg/l (ppm) |
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| 1,000 Litres (220 Gallons) | 18g | 45g |
| 1,500 Litres (330 Gallons) | 27g | 68g |
Always test the water before dosing and adjust gradually if required.
Directions for Use
Test the Water
Begin by testing the total alkalinity of your spa or hot tub water using a reliable test kit. If the level is below 80 mg/l, treatment with Genuine Acti Spa Alkalinity Increaser 1KG is recommended.
Pre-Dissolve the Product
Measure the required amount according to the dosing chart. Dissolve the granules in a clean plastic container using 1 litre of warm water for every 10g of product, stirring until fully dissolved.
Add to the Spa
With the spa circulation system running, slowly pour the dissolved solution near the water inlets to allow for even distribution throughout the spa.
Circulate the Water
Allow the spa pump to circulate the water for at least 30 minutes to ensure the product is fully mixed.
Re-Test the Water
After circulation, test the alkalinity again and repeat the process if necessary until the recommended range is reached.
Important Information
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Suitable for hot tubs and spas
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Always pre-dissolve before adding to water
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Add with circulation system running
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Never mix with other pool or spa chemicals
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Always add chemical to water, not water to chemical
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Store in a cool, dry place
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Keep out of reach of children
Why Choose Genuine Acti Spa Alkalinity Increaser 1KG?
Maintaining the correct alkalinity level is one of the most important aspects of spa water care. Genuine Acti Spa Alkalinity Increaser 1KG provides a simple and reliable way to stabilise water chemistry, prevent corrosion, and ensure consistent pH levels.
Regular use helps protect your spa equipment, maintain effective sanitiser performance, and create a more comfortable bathing environment.
Why Buy From CrystalClear Leisure?
At CrystalClear Leisure, we specialise in high-quality swimming pool and hot tub chemicals from trusted manufacturers. With over 75 years of combined industry experience, our family-run business carefully selects reliable products to help you maintain perfectly balanced water.
Most of our products are in stock and ready for quick dispatch, and we supply a wide range of pool and spa equipment including pumps, filters, heaters, maintenance tools, and spare parts.
If you have any questions about Genuine Acti Spa Alkalinity Increaser 1KG or need help with spa water balancing, please call our shop on 01268 776690 — we’re always happy to help.
Thank you for choosing CrystalClear Leisure.



















