Alkalinity Increaser Sodium Bicarbonate 1kg | Pool & Spa
- Sodium Bicarbonate Formula. The gold standard for raising Total Alkalinity without significantly affecting pH.
- pH-Neutral Action. Raises Total Alkalinity while keeping pH movement minimal.
- Fast-Dissolving. Disperses quickly for even distribution throughout the water.
- Dual-Purpose. Suitable for swimming pools and spa pools of all types.
- Protects Equipment. Prevents corrosion of pumps, heaters, and fittings caused by low Total Alkalinity. Dosing Guide
Spa Pools:
- Add 30g per 1,000L to raise Total Alkalinity by approximately 10 ppm
- Run jets while adding for even distribution
- Retest after 30 minutes before re-dosing
Swimming Pools:
- Add 1.5kg per 50,000L to raise Total Alkalinity by approximately 10 ppm
- Pre-dissolve in a bucket of water before adding to the pool
- Add near a return jet with the pump running
- Allow 6 hours of circulation, then retest before adding more
Tip: Always adjust Total Alkalinity before adjusting pH. Getting Total Alkalinity right first makes pH much easier to control. Test with strips before and after every dose. Available Sizes
- 1kg Pail (this product) - ideal for spas or small top-up doses
- 4kg Pail - most popular for regular pool maintenance
- 10kg Pail - best value for large pools or frequent use Recommended Accessories
- pH Increaser (Soda Ash) 1kg - once Total Alkalinity is correct, use to fine-tune pH up to 7.2-7.6.
- Crystalline Chlorine 4kg - sanitise at the correct Total Alkalinity and pH for maximum effectiveness.
- 5-in-1 Test Strips - test Total Alkalinity, pH, and chlorine before and after every dose.
- Spa Pool Starter Kit - includes Alkalinity Increaser plus everything needed for a fresh fill. Frequently Asked Questions
Q: What is the difference between alkalinity and pH?
A: Total Alkalinity is the buffer that keeps pH stable. Think of it as the anchor, without it pH drifts constantly. Always correct Total Alkalinity first, then adjust pH.
Q: How quickly does Alkalinity Increaser work?
A: It begins working within minutes of application. Allow 6 hours of full circulation before retesting and re-dosing if needed.
Q: Can I add Alkalinity Increaser and chlorine at the same time?
A: No, adjust alkalinity first, wait 6 hours, then add chlorine. Adding both together reduces the effectiveness of both chemicals.
Q: What if my Total Alkalinity is too high?
A: High Total Alkalinity (above 150 ppm) is corrected by adding a pH Decreaser (Sodium Bisulphate) and aerating the water. Test regularly to avoid overcorrecting.
Q: How long will a 1kg pail last?
A: For a 1,000L spa needing a 30 ppm raise in Total Alkalinity, you need approximately 90g. A 1kg pail provides roughly 11 full treatments, or many more for small top-up doses.
Q: Is this safe for all pool and spa types?
A: Yes, safe for concrete, fibreglass, vinyl liner, and tiled pools, and all spa pool types. Pickup and Delivery
Perfect Pools Service Warehouse - 15C Douglas Alexander Parade, Albany, Auckland
Hours: Mon-Fri 9am-4pm - Sat 10am-2pm
NZ-wide delivery available. Charges calculated at checkout.
Questions? Email perfectpoolsnz@gmail.com or visit our contact page.