Happy Hot Tubs - the best for your hot tub
Aquablanc O2 Tablets 1kg

Aquablanc 1kg o2 Tablets 

Chlorine and Bromine free, suitable for all hot tubs and inflatable spas. This non-chlorine active oxygen treatment offers users an alternative for effective sanitisation of hot tub water.

WE STOCK ALL THESE INDIVIDUALLY when you need to top up any Aquablanc products.

The Aquablanc Active O2 system is a dual action system requiring a weekly dose of Aquablanc A Combination Liquid, combined with O2 Tablets dosed via a floating dispenser prior to bathing.


Aquablanc A Combination Liquid
Initial: 60ml Aquablanc A Liquid per 1,500 litres of spa water.
Weekly: 15ml Aquablanc A Liquid per 1,500 litres of spa water.

Aquablanc O2 Tablets
Initial: 2 x 20g tablets per 1,500 litres of spa water.
Prior to bathing: 1 x 20g tablet per 1,500 litres of spa water.

Aquablanc A Combination Liquid can be added directly into the spa with the circulation pump running.
Aquablanc O2 Tablets should be applied via a floating dispenser or spa skimmer to prevent bleaching of spa surface.

Note: A weekly application of AquaSparkle Spa Fusion or non chlorine shock is recommended.


What is Active Oxygen?
Active Oxygen sanitation is based on potassium monopersulphate tablets.  Potassium monopersulphate works in a similar way as chlorine or bromine in that it kills bacteria and breaks down bather waste. However, unlike chlorine or bromine, monopersulphates don't produce by-products that irritate the skin or eyes and cause nasty smells. Active Oxygen O2 tablets are used in conjunction with a weekly does of a liquid activator  which also acts as an algaecide.

How often should I add the liquid?

How often should I add the tablets?
Before you use your hot tub or add some weekly if it is not used.

When should I test the Active Oxygen level?
Always test one hour after application of the O2 tablets. The reading should be 5 - 10 ppm one hour after application.

What TA and pH levels should I maintain?
When using O2 as a sanitiser you should maintain the following water balance:

  • TA 80 - 160 ppm
  • pH 7.0 - 7.4
  • Total Hardness 250 - 500 ppm

Do I still need to use a shock treatment?
Yes. A shock is necessary with any hot tub water treatment system because this is the only way of removing dissolved organic contaminants, such as perspiration, body oil, spray tan, make-up, etc from the water. You should shock weekly with Spa Fusion or a non chlorine shock depending on your hot tub use. You can shock the water with a double dose of O2 tablets if you wish, but use of a chlorine-based powdered shock, such as Spa Fusion,or a non chlorine shock will be more effective.

What is the process to switch to Aquablanc?
Simply drain your spa water and clean your filters, to ensure no excess chlorine or bromine is in the system.

Are any other products needed for Aquablanc?
At first, you may require some shock treatment to clear the previous chlorine/bromine in your system, 

Will this work in my pool?
Yes, Contact us for our Aquablanc pool treatments.

I am allergic to Chlorine, is this ok for me?
Yes, make sure to use a non chlorine shock and this will be perfect for you.

The tablets work very well in my hot tub. Fast delivery and always well packaged. Would definitely recommend. ...

Rated by Sarah Kinnane

brilliant delivery service and good comms an always pleased with the good price of stuff from happy hot tubs ...

Rated by tim batt

As always, excellent product at reasonable price. Fast and reliable delivery too! Why buy anywhere else? Thankyou again! ...

Rated by Carole Evans

Been using aquablanc for a year now and it is far simpler than using bromine or chlorine and the water ...

Rated by Guy Napper