These are some of the most common questions we get asked, if yours is not answered below please contact us and we’ll be happy to help.


What is the shelf life of water purification tablets?
3-5 years depending on packaging and storage conditions. Our expiry dates are clearly stated on packaging.

Where do you manufacture Oasis Water Purification Tablets?
Our Oasis Water Purification Tablets are manufactured in the UK under Good Manufacturing Practices (GMP) environment in a Medicine Licensed Factory (Authorisation number ManA 20725).

What quality guarantee can you give?
Oasis Water Purification Tablets and all finished products are tested and checked for compliance by our Quality Control Team. The manufacturing processes are developed and monitored under strict quality Standards such as ISO 9001:2008, Good Manufacturing Practice (GMP) and British Retail Consortium (BRC) and USA Retail Industry Leaders Association (RILA) Consumer Products Standard.

What EN tests have Oasis Water Purification Tablets passed?
Each of our Oasis Water Purification Tablets have passed one or all of the following EN tests, please refer to individual products for tests passed for that product, or contact us.

  • EN 1276
  • EN 13697
  • EN 1650
  • EN 13704
  • EN 14476
  • EN 1040
  • EN 1275

What are the different packaging formats for Oasis Water Purification Tablets?
The tablets are packed into either strip format or pots.

Can I have one of your products with our own brand?
Yes, please contact us to discuss, our MOQ may be lower than you think.

Where can I find more information on Hydrachems other products?
Please visit Hydrachem to find out more about our range of NaDCC tablets and products.

Oasis Water Purification

Can I break the water purification tablets in half and save them for use later?
The tablet has been designed to be user friendly by dissolving a whole tablet in the recommended volume of water. It is not advisable to break a tablet as it is difficult to obtain two equal parts.

How long should I wait before drinking water?
We recommend 30 minutes for drinking water.

How effective and safe are the Oasis Water Purification Tablets?
When added to water the tablet dissolves to release a measured dose of hypochlorous acid (free available chlorine) that is universally recognised as a safe and effective water disinfectant. The safety of the active ingredient (Sodium dichloroisocyanurate) has been evaluated by the World Health Organisation (WHO). Oasis water purification tablets are NSF/ANSI Standard 60 certified, a guarantee of its safety for both short and long term use.

Will the water purification tablets colour the water and/or leave a chlorine taste afterwards?
Unlike other chemical disinfectants (i.e. iodine) Oasis water purification tablets will not colour the water or leave an unpalatable taste.

Can the water purification tablets be used in cloudy or extremely dirty water with high levels of organic matter and turbidity?
All water to be treated with Oasis water purification tablets should be clear of turbidity and colour or staining. The more sediment and/or organic matter within the water to be treated, the more chances that bacteria, viruses and cysts will be able to “hide” from the chlorine disinfectant. As excessive amounts of disinfectant react with the sediment and/or organic matter, there may not be enough disinfectant to inactivate important contaminants such as bacteria and viruses. Generally, filtering suspect water through a clean cloth or coffee filter should be sufficient.