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Hardness Yes/No Tablets (10 Tablets)Hardness Yes/No Tablets (10 Tablets)Hardness Yes/No Tablets (10 Tablets)Hardness Yes/No Tablets (10 Tablets)

Hardness Yes/No Tablets (10 Tablets)

Price Starting at: £2.99

Bulk Order Discount (Unit Price)

This test is ideal and very easy for determining the hardness (CaCO3) of water, ie. water produced by industrial and domestic water softeners.

Test Procedure:
1. Collect water sample of 20 or 50ml in the container provided.
2. Add the correct number of Hardness YES/NO tablets to the water sample.
The sample size and the number of tablets per test depends on the level of water hardness required:

Water Hardness Required Sample Size Number of Tablets Required
Less than 4 mg/l (ppm) 50ml 1
Less than 8 mg/l (ppm) 50ml 2
Less than 20 mg/l (ppm) 20ml 2

3. Shake until tablets have completely dissolved and no further colour change takes place.
4. Results:

  • If water turns red, the total hardness is more than expected.
  • If water turns green, the total hardness is less than expected.

Cleaning: Rinse out and dry sample container after every test.

Number of Tablets: 10

Please note: Store in a cool, dry place (below 32°C) and away from excess heat and direct sunlight. SDS included. Keep away from children and pets. Avoid contact of test areas on strips with skin & eyes, do not ingest or expose to acids.

Made in Germany

Ref: SH-10-TAB Stock Status: 100 Units in Stock Manufactured by: SimplexHealth

100% FREE Shipping

We ship orders daily Monday - Friday (except bank holidays) and offer the following options:

Orders to UK Mainland UK Address:

  • Order by 12 Noon for same day dispatch
  • FREE Super Saver 3-5 business days
  • EXPRESS 1-2 business days - only £0.99 for orders of less than £75 and £2.99 for orders of £75 or more

Orders to Europe*:

  • Order by 12 Noon for same day dispatch
  • FREE Shipping via Royal Mail International or courier

Orders to Rest of World:**

  • Order by 12 Noon for same day dispatch
  • FREE Shipping via Royal Mail International

We can ship worldwide - please contact us to obtain a quote for your destination.

Special next day delivery available - please contact us to book.


  • Higher value orders may be shipped using recorded delivery or courier at no extra cost to ensure safe arrival.
  • *Shipments to an European Address may take as long as 4-6 working days.
  • **Shipments to a Rest of World address can take 14 + days to arrive, also depending on the speed of customs.
  • All delivery times are estimates and depend on local courier services as well as processing times through Customs.
  • If the country that is receiving your order has strong regulations regarding the importation of goods including nutritional supplements, SimplexHealth cannot be held responsible for any additional fees incurred by Customs and/or Quarantine scanning. We also cannot accept responsibility for items returned by Customs.

Mainland UK includes: England, Scotland, Wales and all BFPO addresses.

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