Fluidra

Products

Support

Calculators

FAQ

Promotions

Find a dealer
Fluidra
Find a dealer
FAQPromotions
Fluidra
Fluidra© 2026 Fluidra. All rights reserved. The trademarks and trade names used herein are the property of their respective owners.
Zodiac Facebook
Zodiac Facebook
Zodiac Instagram
Zodiac Instagram
Zodiac Youtube
Zodiac Youtube
Phone: 1300 763 021Mon-Fri 9am - 6.00pm EST.
About Us
  • Dealer Log In

About Zodiac
  • About Us

  • Contact Us

Support
  • Pool Pump Calculator

  • Product Recall

Legal
  • Privacy Policy

  • Terms & Conditions

About Us
  • Dealer Log In

About Zodiac
  • About Us

  • Contact Us

Support
  • Pool Pump Calculator

  • Product Recall

Legal
  • Privacy Policy

  • Terms & Conditions

To learn how we process your data, visit our Privacy Policy.

  1. Home
  2. Products
  3. Pool Chemicals
  4. Pure Balance
  5. PH Down
  1. Home
  2. ...
  3. PH Down
pH Down - WC000421

pH Down - WC000421

Product information

SKU WC000421

Product description

Decreases pH and Total Alkalinity in swimming pools. Ideal range for pH should be between 7.2 – 7.8. Pack Size: 3kg

Application • 150g decreases Total Alkalinity by 10ppm per 10,000L • If pH >8.2 add 200g per 10,000L • If pH 8.0 – 8.2 add 120g per 10,000L • If pH 7.8 – 8.0 add 60g per 10,000L Pro Tip: • When wanting to lower pH and not Total Alkalinity, dissolve the product in a bucket of water, and then apply evenly around the edges of the pool • When wanting to lower Total Alkalinity with only a slight effect on pH, simply take your dose of dissolved dry acid and pour it slowly into one spot in the deep end of your pool. • High pH reduces the effectiveness of your chlorine

Specifications

  • Size: 3kg
  • Active Constituent : 1000g/Kg Sodium Bisulphate

Product information

  • Brand: zodiac-au
  • SKU: WC000421
Equipment assistance
Lifestyle
Lifestyle

Product information

  • Specs
  • Resources
SpecificationWC000421WPQDA25

Size

3kg

25kg

Active Constituent

1000g/Kg Sodium Bisulphate

1000g/Kg Sodium Bisulphate

Size
WC000421
3kg
WPQDA25
25kg
Active Constituent
WC000421
1000g/Kg Sodium Bisulphate
WPQDA25
1000g/Kg Sodium Bisulphate
Brochure
  • Chemicals Brochure

    Download
MSDS
  • Zodiac pH Down - Safety Data Sheet (SDS)

    Download