The pH of your spa water is much more important for chlorine than it is for bromine. The pH needs to be kept between 7.2 – 7.6 to ensure optimum conditions for the chlorine to kill unwanted pollution. When necessary you can raise the pH using Fi-Clor Spa pH Increaser (Soda Ash) and lower it using Fi-Clor Spa pH & Alkalinity Reducer (Dry Acid).

There are several reasons for operating within this band, the most important being the pH of your mucous membranes (eyes, nose, throat) is about 7.4, so the closer you can keep the pH to this, the more comfortable it will be. A high pH will lead to cloudy water and excessive scaling. Should any scaling occur, it can be removed using Fi-Clor Spa Anti-scale. Meanwhile, a low pH will create acidic conditions which may corrode the metal parts of the system.

If the pH rises above 7.6, reduce it by adding Fi-Clor Spa pH & Alkalinity Reducer (Dry Acid) at a rate of 10gms per m3 (220 gall)

- Calculate how much Fi-Clor Spa pH Increaser (Soda Ash) is needed for your size spa

- Add this to a clean plastic jug filled with warm water (the warm water will assist dissolution).

- Add the chemical to water, not the water to the chemical.

- Mix the product until it has completely dissolved.

- Carefully pour the solution round the spa.

- Allow at least 15 minutes before retesting the pH.