Chemistry Balance Advice


Here are the ideal swimming pool chemistry balances for most pools and why they are important!

Chemical Ideal chemistry level Reason
pH 7.2 to 7.8 pH stands for “power of Hydrogen” the measure of the concentration of hydrogen ions in a solution. Not only does the pH level determine how effective chlorine will be, but it also helps prevent scale formation and corrosion which can lead to costly repairs. Besides this, a Low pH can cause damage to pool liners and etching of plaster, corrosion of metal components in and around the pool, skin and eye damage, and a reduction of total alkalinity. On the other hand, high pH water can cause scale formation, metal stains, cloudy water, poor efficiency of chlorine, and also can cause skin and eye irritation. Staying within the recommended range will avoid those problems.
Total Alkalinity 80ppm to 120ppm Prevents sudden pH changes. pH can fluctuate up and down. And when it does, the pool is constantly fighting against you. Having the right level of total alkalinity is a good thing, because it helps to keep the pH stabilised. Another way to think of total alkalinity’s role is that it neutralises acid.
Total Chlorine 1ppm to 3ppm Total Chlorine is the sum of both Free Chlorine and Combined Chlorine. Combined Chlorine is chlorine that’s been used up by the sanitation process of the water. While it’s still in the water, its ability to sanitise is reduced compared to your free chlorine.
Total Hardness 250ppm to 500ppm Measure of how hard or soft your pool water is, and how much calcium is dissolved in your pool water. If your water has become too hard, it can result in cloudy pool water, and you may have to shock your pool. At the same time, it can also lead to the build-up of calcium sediments on the sides of your pool and even inside the plumbing of your pool. If your water is too soft, meaning the calcium hardness levels have fallen below the ideal amount in your pool, the water will become corrosive. When it does, it can begin to dissolve the concrete and begin to corrode metal in your pool resulting in potentially expensive pool repairs down the road.
Free Chlorine 1ppm to 3ppm Helps ensure you have clean & clear water suitable for bathers. This is the free chlorine that is available to sanitise your pool.
Cyanuric Acid (Stabiliser) 30ppm to 100ppm Helps protect against chlorine loss from exposure to sunlight.
Total Bromine 2ppm to 10ppm The chemical “Bromine” is part of the same family and very similar to chlorine in the way that it kills bacteria and harmful contaminants, but the two chemicals react in different ways in the swimming pool water. Bromine is most commonly used to sanitise spas/hot tubs because it is more stable than chlorine in the warmer water temperatures. The bromamines which are formed when bromine is added to pool or spa water kill pathogenic microorganisms and do not give off odours.