The cornerstone of the PristineBlue system, is an environmentally friendly algicide and bactericide. It is applied  initial and maintenance doses.

Initial dose: Add the initial does at a rate of 25 ml per 1000 litres of hot tub water.

Maintenance dose: The PristineBlue concentration in the water must be maintained at 0.9 ppm, measured using the Copper Test Kit.  With normal use, it is only necessary to test the water once per fortnight since the liquid does not 'burn off', it stays in the water until it is used up by the demands of the tub.  The maintenance dose of PristineBlue liquid is likely to be between 2.5 ml and 25.0 ml per 1000 litres of hot tub water, depending on the size of your tub and the usage.

PristineBlue works best when the calcium hardness of the fresh water in your spa is less than 250 ppm.  If the calcium hardness is above this level (as indeed it is in a lot of UK tap water) you then add PristineCheck at a rate of 25ml per 1000 litres of water.  Run your tub on the filtration cycle for 4 to 6 hours while PristineCheck sequesters the calcium out of the water and into the filter.

As with any sanitiser system you should make sure that your water is adequately balanced to protect your equipment and ensure that the water remains comfortable to bathe in. When using PristineBlue the total alkalinity should be in the range 30 - 90 ppm and the pH should be in the range 7.0 - 7.4. If your fresh water is outside this range you should use adjusters to first adjust the total alkalinity and then the pH.

Each 1 lt bottle of PristineBlue lasts 16 - 44 months, depending on the size of your spa.  The table below shows how long one bottle will last in your hot tub.