Skip to Content

Track Order Returns Stores Help

Logo - go to homepage

Shop
Trending
Shop A-mazing deals

Shop at Argos
Shop all categories
Trending
Shop A-mazing deals
Need Help?
Track Order
Returns
Stores
Help
Advice & Inspiration

- Back to Categories

Search

Use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.

Account Wishlist Trolley

Small Item Delivery £4.95, free over £100
Large Item Delivery £9.95
A year of fast delivery with Argos Plus

Best results for

water ph increaser and decreaser

Sort by

Filters

Brands

ClearWater(2)

Type

Hot tub cleaning(2)

Customer Rating

Show All

4 or more

3 or more

2 or more

1 or more

Price

£5 - £10(2)

to see what’s available

2 products

Clearwater 1.5kg Water pH Decreaser

Clearwater 1.5kg Water pH Decreaser

Rating 4.8 out of 5, from 13 reviews

(13)

£9.99

ClearWater 1Kg Water pH Increaser

ClearWater 1Kg Water pH Increaser

Rating 4.7 out of 5, from 48 reviews

(48)

£8.99

*Argos Pay Representative Example

Representative 34.9% APR (variable), 34.95% PA purchase rate (variable), £1,200 assumed credit limit.

Offers and credit subject to status. 18+. UK only. Terms apply. NewDay Ltd is the lender, Argos Limited is the broker.

Search feedback: Were these results helpful?

Need help?

Help & FAQs
Contact us
Store finder
Account
Advice & inspiration

Delivery & returns

Delivery & collection
Returns
Refunds
Track your order
Argos Plus

Product care

Argos Care
Product Support
Product recall
Argos Spares

Payment & services

Ways to pay
Our Services
Gift cards
Voucher codes
eGift Card Rewards
Argos Pay
Klarna
Nectar at Argos
Pet Insurance
Furniture Recycling

About Argos

About us
Argos for Business
Careers
Press enquiries
Modern Slavery Statement
Sell on Argos

Need help?

Help & FAQs
Contact us
Store finder
Account
Advice & inspiration

Delivery & returns

Delivery & collection
Returns
Refunds
Track your order
Argos Plus

Product care

Argos Care
Product Support
Product recall
Argos Spares

Payment & services

Ways to pay
Our Services
Gift cards
Voucher codes
eGift Card Rewards
Argos Pay
Klarna
Nectar at Argos
Pet Insurance
Furniture Recycling

About Argos

About us
Argos for Business
Careers
Press enquiries
Modern Slavery Statement
Sell on Argos

Returning an item

For returns, product support and repairs Learn more here

Payment methods

Follow us

Download our app

Accessibility Privacy hub Privacy policy Cookies policyTerms & conditions

© Argos Limited 2026. All Rights Reserved.

*Argos Pay is provided by NewDay Ltd. UK residents aged 18 and over. Offers and credit subject to status. Terms apply.

Argos Limited is a credit broker and not a lender, introducing Argos Pay under an exclusive arrangement with the lender NewDay Ltd.

Argos Limited is authorised and regulated by the Financial Conduct Authority (firm reference number: 713206), registered office: 33 Charterhouse Street, London, EC1M 6HA). NewDay Ltd is a company registered in England and Wales (company number: 7297722), registered office: 7 Handyside Street, London, N1C 4DA. NewDay Ltd is authorised and regulated by the Financial Conduct Authority (firm reference number: 690292) and is also authorised by the Financial Conduct Authority under the Payment Services Regulations 2017 (firm reference number: 555318) for the provision of payment services.

PayPal Pay in 3 is the trading name of PayPal UK LTD, 5 Fleet Place, London, United Kingdom, EC4M 7RD. Terms and conditions apply. Credit subject to status, UK residents only. Argos Limited acts as a broker and offers finance from a restricted range of finance providers. PayPal Pay in 3 is regulated by the Financial Conduct Authority. Pay in 3 eligibility is subject to status and approval. 18+ UK residents only. Pay in 3 is a credit agreement. Check if affordable and how you will repay. May make other borrowing more difficult or expensive. See product terms for more details.

Klarna's Pay in 3 / Pay in 30 days are regulated credit agreements. Borrowing more than you can afford or paying late may negatively impact your financial status and ability to obtain credit. 18+, UK residents only. Subject to status. Ts&Cs and late fees apply.

Argos Care policies are provided by Domestic & General Insurance PLC, who are an insurer not an intermediary. They have not given you a personal recommendation as to whether this policy is suitable for your needs.