Skip to main content

DEALS LIVE NOW - SAVE UP TO 40%! VIEW DETAILS

     Spa World Logo
Spa Pools & More Parts & Accessories
0 0
SEARCH
  • Chemicals Chemicals
    Browse all Chemicals
    • Chemical Type
      • All Chemicals
      • Sanitiser
      • Shock
      • Testing & Balancing
      • Anti Foam & Clarifiers
      • Cleaning
      • Aromatherapy
      • Pipe Cleaners & Conditioners
      • Chemical Startup kits
      • Water Softeners & Minerals
    • Chemical System
      • For All Systems
      • Chlorine Free System
      • Chlorine System
    • Chemical Brand
      • All Brands
      • Spa Store™
      • SpaCare™
      • Poppits®
      • Zodiac®
      • BioGuard®
      • 303®
    • Chemical FAQ
      • Chemical quickstart guide
      • What is the best spa sanitiser?
      • How do I use test strips?
      • Saltwater vs chlorine sanitising
      • Why is my spa foaming?
      • Why is my spa water cloudy?
  • Filters Filters
    Browse all Filters
    • Filter Type
      • Spa Filters
      • Pool Filters
      • Filter Parts
    • Length
      • 100-199mm
      • 200-250mm
      • 250-399mm
      • 400mm+
    • Brand
      • All Brands
      • Vortex Spas™
      • Fisher Spas™
      • Jacuzzi®
      • Sundance®
      • Hotspring®
      • Arcadia®
      • Davey® / Spa Quip®
      • Waterway®
      • Waterco®
      • O2®
      • CMP®
    • Bottom type
      • Threaded
      • Non-Threaded
  • Covers Covers
    Browse all Covers
    • Spa Cover Type
      • All Covers
      • Portable Spa Covers
      • Swim Spa Covers
    • Spa Brand
      • All Brands
      • Vortex® Spa Covers
      • Fisher® Spa Covers
      • Jacuzzi® Spa Covers
    • Spa Cover Size
      • All Sizes
      • 1m - 1.49m
      • 1.5m - 1.99m
      • 2m - 2.29m
      • 2.3m - 2.99m
      • 3m - 3.99m
      • 4m +
      • Custom Size
    • Cover Accessories
      • Cover Lifters
      • Clips, Locks & Straps
      • Cover Maintenance / Cleaning
      • ClearLift™ Parts
      • Protective Coveralls
  • Accessories Accessories
    Browse all Accessories
    • Accessory Type
      • All Accessories
      • Spa Cover Lifters
      • Spa Steps
      • Vacuum Cleaners
      • Entertainment
      • Spa Cleaning
      • Booster Seats & Pillows
      • Filter Cleaners
      • Aqua Fitness
      • Spa Headrests
    • Outdoor Heating
      • All outdoor heating
      • Electric Heaters
    • Lifestyle
      • Saunas
      • Louvre Pergolas
      • Umbrellas
      • Outdoor Showers
      • Ice Baths
  • Spa Parts Spa Parts
    • Spa Headrests
    • Spa Pumps
    • Spa Heaters
    • Heat Pumps
    • Spa Blowers (Air Pumps)
    • Spa Jets
    • Spa Controllers & Electronics
    • Ozone & UV
    • Spa Lighting
    • Cabinet Parts
    • Spa AV, Stereo & WIFI
    • Spa Plumbing
  • On Sale On Sale
  • My Account My Account
  • Contact Contact
    Browse all Contact
    • Contact Us
    • Articles
    • Videos
    • Knowledge Base
    • Manuals & User Guides
    • Cover FAQ
  • Resources Resources
    • Articles
    • Videos
    • Knowledge Base
    • Manual & User Guides
    • Cover FAQ
  • Chemicals
    • Chemical Type
      • All Chemicals
      • Sanitiser
      • Shock
      • Testing & Balancing
      • Anti Foam & Clarifiers
      • Cleaning
      • Aromatherapy
      • Pipe Cleaners & Conditioners
      • Chemical Startup kits
      • Water Softeners & Minerals
    • Chemical System
      • For All Systems
      • Chlorine Free System
      • Chlorine System
    • Chemical Brand
      • All Brands
      • Spa Store™
      • SpaCare™
      • Poppits®
      • Zodiac®
      • BioGuard®
      • 303®
    • Chemical FAQ
      • Chemical quickstart guide
      • What is the best spa sanitiser?
      • How do I use test strips?
      • Saltwater vs chlorine sanitising
      • Why is my spa foaming?
      • Why is my spa water cloudy?
  • Filters
    • Filter Type
      • Spa Filters
      • Pool Filters
      • Filter Parts
    • Length
      • 100-199mm
      • 200-250mm
      • 250-399mm
      • 400mm+
    • Brand
      • All Brands
      • Vortex Spas™
      • Fisher Spas™
      • Jacuzzi®
      • Sundance®
      • Hotspring®
      • Arcadia®
      • Davey® / Spa Quip®
      • Waterway®
      • Waterco®
      • O2®
      • CMP®
    • Bottom type
      • Threaded
      • Non-Threaded
  • Covers
    • Spa Cover Type
      • All Covers
      • Portable Spa Covers
      • Swim Spa Covers
    • Spa Brand
      • All Brands
      • Vortex® Spa Covers
      • Fisher® Spa Covers
      • Jacuzzi® Spa Covers
    • Spa Cover Size
      • All Sizes
      • 1m - 1.49m
      • 1.5m - 1.99m
      • 2m - 2.29m
      • 2.3m - 2.99m
      • 3m - 3.99m
      • 4m +
      • Custom Size
    • Cover Accessories
      • Cover Lifters
      • Clips, Locks & Straps
      • Cover Maintenance / Cleaning
      • ClearLift™ Parts
      • Protective Coveralls
  • Accessories
    • Accessory Type
      • All Accessories
      • Spa Cover Lifters
      • Spa Steps
      • Vacuum Cleaners
      • Entertainment
      • Spa Cleaning
      • Booster Seats & Pillows
      • Filter Cleaners
      • Aqua Fitness
      • Spa Headrests
    • Outdoor Heating
      • All outdoor heating
      • Electric Heaters
    • Lifestyle
      • Saunas
      • Louvre Pergolas
      • Umbrellas
      • Outdoor Showers
      • Ice Baths
  • Spa Parts
    • Spa Headrests
    • Spa Pumps
    • Spa Heaters
    • Heat Pumps
    • Spa Blowers (Air Pumps)
    • Spa Jets
    • Spa Controllers & Electronics
    • Ozone & UV
    • Spa Lighting
    • Cabinet Parts
    • Spa AV, Stereo & WIFI
    • Spa Plumbing
  • On Sale
  • My Account
  • Contact
    • Contact Us
    • Articles
    • Videos
    • Knowledge Base
    • Manuals & User Guides
    • Cover FAQ
  • Resources
    • Articles
    • Videos
    • Knowledge Base
    • Manual & User Guides
    • Cover FAQ
Contact Us
1300 706 716 shop@spaworld.com.au
Can't find what you are looking for? Use our Al assistant to get more information on our products and services.
Open AI Assistant

All items available online only

CONTACT US
  1. Parts & Accessories
  2. Spa Chemicals
  3. Spa World Chemicals
  4. Spa World pH Decreaser 1Kg
Spa World pH Decreaser 1Kg

Spa World pH Decreaser 1Kg

Decreases pH in spas

Why Pay $16.41
Now $13.25
YOU SAVE $3.16
In Stock - Online Only
Buy Now, Pay Later With zipPay

4 x $3.31 Fortnightly Payments with Afterpay Logo

[%/format%]
Notify Me
Questions? Ask our AI Assistant.
Afterpay Logo
4 x $3.31 Fortnightly Payments

Notify me when back in stock

Please tick this box to proceed.

Calculate Shipping

Create a Bundle

Spa World pH Decreaser 1Kg
This Product
✓

Spa World pH Decreaser 1Kg

$13
Heavy Duty Filter Cleaner - Filter Wand
✓
+

Heavy Duty Filter Cleaner - Filter Wand

$30
Spa World 500gm Granular Filter Cleaner
✓
+

Spa World 500gm Granular Filter Cleaner

$22
Spazazz Escape Aromatherapy Beads - CALM
✓
+

Spazazz Escape Aromatherapy Beads - CALM

$11
📦
2 items
Bundle Price
$43
technical help
Need technical help?
Click here to book a technician

Spa World pH Decreaser 1Kg

 

Product Features

  • An effective way to reduce the pH level & alkalinity in spa water
  • Provides for more effective chlorine performance and superior water comfort
  • Prevents cloudy water and scale build-up caused by high pH levels
  • Can be used with Chlorine and Hydrogen Peroxide
  • May be used with Nature 2
  • Safe to store and handle
  • No nasty fumes

 

USAGE INSTRUCTIONS

  1. This product is used for lowering pH and alkalinity. The ideal pH level is 7.4 - 7.6
  2. Always test the water using test strips before adding chemicals 
  3. Dissolve the product in a bucket of spa water, and then apply the solution evenly around the edges of the spa with the filter running for 1 hour.
  4. As a guide, do not add more than 30 grams of this product to 1000L of spa water at any one time and allow 1-2 hours before subsequent dosing.

 

Specifications

  • Size: 1kg
  • Model: 5002018A
  • Manufacturer: Spa World™

 

Download Product MSDS

 

GENERAL INSTRUCTIONS

  • We recommended pH testing regularly by use of reliable test strips
  • If pH falls outside the required range (7.2-7.6) add pH increaser or pH decreaser as needed. 
  • Dose spa 8-10 hours before planned use time. (If you plan on using the spa in the evening, dose in the morning).

 

Read the guide below for more details on maintenance in your spa

 

MAINTENANCE GUIDE

 

DISCLAIMER

Any advice or suggestions above, including but not limited to instructions and dosing rates are intended to be a guide only. Spa World and its staff recommend you read the full instructions on all chemical containers. We will not accept responsibility for the use of these products.

 

Got more questions?

Talk to us on live chat, or email us your spa questions and we'll be happy to help!

 

TALK TO AN EXPERT

 

link DOWNLOAD INFORMATION
Can't find what you are looking for? Use our Al assistant to get more information on our products and services.
Open AI Assistant
SKU 5002018ASW
Barcode # 9342344003202
Brand Spa World™
Shipping Weight 1.0000kg
Shipping Width 0.100m
Shipping Height 0.240m
Shipping Length 0.100m
Shipping Cubic 0.002400000m3
Unit Of Measure ea
  • Description
technical help
Need technical help?
Click here to book a technician

Spa World pH Decreaser 1Kg

 

Product Features

  • An effective way to reduce the pH level & alkalinity in spa water
  • Provides for more effective chlorine performance and superior water comfort
  • Prevents cloudy water and scale build-up caused by high pH levels
  • Can be used with Chlorine and Hydrogen Peroxide
  • May be used with Nature 2
  • Safe to store and handle
  • No nasty fumes

 

USAGE INSTRUCTIONS

  1. This product is used for lowering pH and alkalinity. The ideal pH level is 7.4 - 7.6
  2. Always test the water using test strips before adding chemicals 
  3. Dissolve the product in a bucket of spa water, and then apply the solution evenly around the edges of the spa with the filter running for 1 hour.
  4. As a guide, do not add more than 30 grams of this product to 1000L of spa water at any one time and allow 1-2 hours before subsequent dosing.

 

Specifications

  • Size: 1kg
  • Model: 5002018A
  • Manufacturer: Spa World™

 

Download Product MSDS

 

GENERAL INSTRUCTIONS

  • We recommended pH testing regularly by use of reliable test strips
  • If pH falls outside the required range (7.2-7.6) add pH increaser or pH decreaser as needed. 
  • Dose spa 8-10 hours before planned use time. (If you plan on using the spa in the evening, dose in the morning).

 

Read the guide below for more details on maintenance in your spa

 

MAINTENANCE GUIDE

 

DISCLAIMER

Any advice or suggestions above, including but not limited to instructions and dosing rates are intended to be a guide only. Spa World and its staff recommend you read the full instructions on all chemical containers. We will not accept responsibility for the use of these products.

 

Got more questions?

Talk to us on live chat, or email us your spa questions and we'll be happy to help!

 

TALK TO AN EXPERT

 

link DOWNLOAD INFORMATION
Can't find what you are looking for? Use our Al assistant to get more information on our products and services.
Open AI Assistant

Specifications

SKU 5002018ASW
Barcode # 9342344003202
Brand Spa World™
Shipping Weight 1.0000kg
Shipping Width 0.100m
Shipping Height 0.240m
Shipping Length 0.100m
Shipping Cubic 0.002400000m3
Unit Of Measure ea

technical help
Need technical help?
Click here to book a technician

Spa World pH Decreaser 1Kg

 

Product Features

  • An effective way to reduce the pH level & alkalinity in spa water
  • Provides for more effective chlorine performance and superior water comfort
  • Prevents cloudy water and scale build-up caused by high pH levels
  • Can be used with Chlorine and Hydrogen Peroxide
  • May be used with Nature 2
  • Safe to store and handle
  • No nasty fumes

 

USAGE INSTRUCTIONS

  1. This product is used for lowering pH and alkalinity. The ideal pH level is 7.4 - 7.6
  2. Always test the water using test strips before adding chemicals 
  3. Dissolve the product in a bucket of spa water, and then apply the solution evenly around the edges of the spa with the filter running for 1 hour.
  4. As a guide, do not add more than 30 grams of this product to 1000L of spa water at any one time and allow 1-2 hours before subsequent dosing.

 

Specifications

  • Size: 1kg
  • Model: 5002018A
  • Manufacturer: Spa World™

 

Download Product MSDS

 

GENERAL INSTRUCTIONS

  • We recommended pH testing regularly by use of reliable test strips
  • If pH falls outside the required range (7.2-7.6) add pH increaser or pH decreaser as needed. 
  • Dose spa 8-10 hours before planned use time. (If you plan on using the spa in the evening, dose in the morning).

 

Read the guide below for more details on maintenance in your spa

 

MAINTENANCE GUIDE

 

DISCLAIMER

Any advice or suggestions above, including but not limited to instructions and dosing rates are intended to be a guide only. Spa World and its staff recommend you read the full instructions on all chemical containers. We will not accept responsibility for the use of these products.

 

Got more questions?

Talk to us on live chat, or email us your spa questions and we'll be happy to help!

 

TALK TO AN EXPERT

 

Can't find what you are looking for? Use our Al assistant to get more information on our products and services.
Open AI Assistant

SKU 5002018ASW
Barcode # 9342344003202
Brand Spa World™
Shipping Weight 1.0000kg
Shipping Width 0.100m
Shipping Height 0.240m
Shipping Length 0.100m
Shipping Cubic 0.002400000m3
Unit Of Measure ea
technical help
Need technical help? Click here to book a technician

We Also Recommend

Spazazz Escape Aromatherapy Beads - CALM

Spazazz Escape Aromatherapy Beads - CALM

Why Pay $13.80
Now $10.95 Save $2.85

Interest free with. zip-pay afterpay

Heavy Duty Filter Cleaner - Filter Wand

Heavy Duty Filter Cleaner - Filter Wand

Why Pay $35.46
Now $29.95 Save $5.51

Interest free with. zip-pay afterpay

Spa World 500gm Granular Filter Cleaner

Spa World 500gm Granular Filter Cleaner

Why Pay $24.75
Now $21.99 Save $2.76

Interest free with. zip-pay afterpay

Most Popular

Heavy Duty Filter Cleaner - Filter Wand

Heavy Duty Filter Cleaner - Filter Wand

Why Pay $35.46
Now $29.95 Save $5.51

Interest free with. zip-pay afterpay

free shipping

Telsa® 30 Rechargeable Spa Vacuum Cleaner

Telsa® 30 Rechargeable Spa Vacuum Cleaner

Why Pay $329.95
Now $299.95 Save $30.00

Interest free with. zip-pay afterpay

*OUT OF STOCK

All-in-One Digital pH Tester / Salinity Tester and Temperature Probe 

All-in-One Digital pH Tester / Salinity Tester and

Why Pay $109.00
Now $99.00 Save $10.00

Interest free with. zip-pay afterpay

Often purchased with this item

Spa World 1Kg Alkalinity Up

Spa World 1Kg Alkalinity Up

Why Pay $19.45
Now $12.95 Save $6.50

Interest free with. zip-pay afterpay

Spa World 500g Alkalinity Up

Spa World 500g Alkalinity Up

Why Pay $12.18
Now $9.44 Save $2.74

Interest free with. zip-pay afterpay

Spa World™ pH Decreaser 500g

Spa World™ pH Decreaser 500g

Why Pay $12.55
Now $9.95 Save $2.60

Interest free with. zip-pay afterpay

More From This Category

Spa World™ Chlorine Sanitiser 500g

Spa World™ Chlorine Sanitiser 500g

Why Pay $19.95
Now $14.95 Save $5.00

Interest free with. zip-pay afterpay

*OUT OF STOCK

Zodiac® Spa Shock 500g

Zodiac® Spa Shock 500g

More Information

Interest free with. zip-pay afterpay

Spa World™ Spa Chlorine Sanitiser 2kg

Spa World™ Spa Chlorine Sanitiser 2kg

Why Pay $56.30
Now $39.95 Save $16.35

Interest free with. zip-pay afterpay

Five Star Trust Pilot Rating

We are proud that Spa World customers have given us a Five Star Trustpilot rating.

Trustpilot
Hassle Free Returns

Hassle Free Returns

For peace of mind

EARN REWARD POINTS

EARN REWARD POINTS

With a Spa World Account

FAST, FREE SHIPPING

FAST, FREE SHIPPING

on AU orders over $199*

WE'VE GOT YOUR BACK

WE'VE GOT YOUR BACK

With 7-day online chat support

Spa World

Stay Connected

  • Facebook
  • Twitter
  • Instagram
  • Pinterest
  • Linkedin

About Us

  • Terms of Use
  • Privacy Policy
  • Returns Policy
  • Shipping Policy

Shopping Assistance

  • My Account
  • Track Order
  • Resolution Center

Contact Us

  • 1300 556 558
  • shop@spaworld.com.au

Office Hours AEST:

  • Mon - Fri: 9:00 am to 5:00 pm
  • Sat: 10:00 am to 4:00 pm
  • Sun: 10:00 am to 4:00 pm
  • Closed Public Holidays
    including Easter

Stay Connected

  • Facebook
  • Twitter
  • Instagram
  • Pinterest
  • Linkedin

Spa World

Free shipping on orders $199.00+ *Excludes spa covers, heat pumps, umbrellas, saunas, pergolas, fire tables, dangerous goods, trade orders and is only valid in Australia.

Copyright © 2026 Spa World Australia Pty Ltd.

ABN: 94 141 609 663

Your Cart

$13.25