NLS - Replaced by SC Alkalinity Increaser
Increases total alkalinity and pH levels in spas. Also known as Sodium Bicarbonate, Buffer, Bicarb. Acts as a pH buffer to prevent extreme pH shifts.
Ideal TA level is usually 80-150ppm. Low Total Alkalinity can cause damage to plastics, heaters, seals, and pumps.
200g will raise Total Alkalinity by 10ppm per 10,000 liters
Please try our Search first— try entering any part numbers, models, or measurements. There’s a good chance you’ll find it! Still can't find it?
We’re here to help. For the fastest, most accurate response, please include:
Heater & Spa Parts has Australia’s largest range of spa spare parts, supplies, and pool heaters from top brands. We're a real store with real stock—not just another drop-shipper.
We're 100% Australian-owned and operated, with warehouses in VIC, NSW, QLD & WA, and we ship faster than anyone. We have a physical retail store at 10 Industry Blvd, Carrum Downs, Vic.
As authorised dealers and service agents for major brands, and former employees of leading manufacturers, we know our stuff.
We're proud SPASA and Master Plumbers members, working closely with top manufacturers and distributors.
With over 50,000 parts across 5,000+ product lines, we stock everything from filters, pumps, jets, chemicals, heaters, touchpads, control panels, and more—plus manuals and expert info to help you out.
We stock and supply parts from all the major brands: Aeware, AquaFlo, Astralpool, Balboa, CG Air, CMP, Darlly, Davey, Del Ozone, Edgetec, Fluidra, Gecko, Hurlcon, Jandy, LX, Madimack, Magnum, Pentair, Raypak, Rheem, SpaNet, Spa-Quip, SpaPro, Waterco, Waterway, Zodiac—and many more.
Our parts are compatible with popular spa brands including Alpine, Arctic, Artesian, Bullfrog, Caldera, Cyclone, Decina, Dimension One, Endless®, Fisher, HotSpring, Just Spas, LA Spas, Maax, Monarch, Oasis, Sapphire, Signature, Sundance, Vortex® and dozens more.
Please note: Images are for illustration only—actual products may vary. Some OEM parts may arrive without packaging or manuals.
Where available, manuals are on the product page or provided on request.
All parts must be installed by qualified professionals. Electrical and gas work must be carried out by licensed technicians.
Warranty Info: As an authorised service agent, our process is quick and straightforward. See our Warranty page for details.
Returns Policy: 30-day returns on many products, excluding electrical and some other items. See our returns policy here.
Contact Us
eMail: info@hasp.com.au
Hours: 8am-3pm Weekdays AET (Hours may vary)
Physical Store: 10 Industry Blvd, Carrum Downs, Vic 3201
Shipping From: VIC, NSW, QLD, WA
Phone: 1300 418 299
Free shipping
* Free shipping on most orders over $149.00 - T&Cs here.
Choose Express Post for fastest delivery.
Pickups available from 10 Industry Blvd, Carrum Downs, Vic. Order online and we'll contact you when it's ready!
Express Post
Express Post available on most items. More Info here.
Shipping from: VIC, NSW, QLD, WA
Contact us before ordering to ensure stock availability.
Help & Technical Info
Contact us here for identification, technical, or other help. Please include photos and measurements for ID.
Secure payments
We accept major Credit cards, Paypal, Afterpay, Zip, Apple Pay, Google Pay, Shop Pay
