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Acti Spa Alkalinity Increaser 1kg

Acti Spa Alkalinity Increaser 1kg
Our Price:  £7.50

(Inc. 20% VAT)

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5 in stock, immediate despatch

Acti Spa

  • Raises the total alkalinity of spa water
  • Stabilises pH levels in water
  • 1KG container of granules


Acti Spa Hot Tub Chemicals

1.5kg Tub of Hot Tub Alkalinity Increaser Granules

Raises total alkalinity levels in water

Contains Sodium Bicarbonate

Using this product and getting your total alkalinity levels to the correct levels between 80 - 150 (PPM) will stop your spa water from being corrosive and help in the stability of the pH levels.

The total alkalinity levels in your spa water will only ever reduce with usage, hence no reducer is available only increaser.

To do this test the water with a test strip or total alkalinity tester and gently sprinkle a small amount of this 'Acti Spa Alkalinity Increaser' and allow to dissolve, wait 30 minutes and test again.

Part of the Acti Spa chemical range.

Manufacturers Code

Part Number:  act-500-0506

Product Specification

SKU:  80508
Brand:  Acti Spa
Sanitising Type:  None
PH Balancer:  Alkalinity Increaser
Quantity (kg):  1KG
Material Type:  Granule

Related Products

Need More Detail?

At Hot Tub DIY we want to make it as easy as possible for you to repair or build your hot tub, the following guides relate to this product.

For a full list of guides please go to our Articles page and choose a section : Hot Tub Help Articles

Hot Tub Chemical Guides

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Delivery Charges

We’ve reduced many of the delivery charges and now offer a better range of options linked to the value of your order. Plus we have included free packaging and handling for all orders.

Some larger Items

Some larger items (for example hot tub covers) come with a delivery surcharge, these are individual costs that only apply to these specific items. Detail of the costs are on the specific item pages and appear in the postage cost.

Liquids and Chemicals

Please note we cannot send liquids and chemicals to anywhere other than main land UK due UK and international Chemical handling laws.

England and Wales

Hot Tub Part delivery

Next Day Delivery

England and Wales (if ordered before 11:59am)(Signed Courier) - £7.50

Orders placed before 12am will arrive the next working day via courier excluding Saturday and Sunday deliveries.

Please call for prices in other areas for a quotation.

Next day delivery hot tub parts

Standard 2-3 days delivery

Delivery England and Wales Only (Royal Mail) - Cost £5.50 (under £50) - Free on orders over £50

Please call for prices in other areas for a quotation.


All other items and areas

The standard charges have been set high to cover extra cost on postage to other areas, so please get in touch for a quotation.

Small Items Only Via Royal Mail - £3.70
Scottish Highlands & Islands - £16
Northern Ireland and Isle of Man - £26.40 (call for cheaper)
Southern Ireland - £18.00 (call for cheaper)
Channel Island - £47.00 (call to arrange)
Please Call or Email if you are outside these areas

Want more detail or help on a Acti Spa Alkalinity Increaser 1kg?

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Please feel free to ask any questions about this product or other hot tub related items including how to repair, replace and test this item or any other items.

Telephone: 01209 808343


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