Water Balance In Swimming Pools And How it Affects Maintenance
Attention: Water balance is very important to ensure that your swimming pool chemicals work properly and for as long as they should
You must be familiar with the way your pool or spa works before adding any swimming pool chemical Good water circulation and filtration are essential to achieving a safe and clear bathing environment.
Water balance is the first thing to establish when treating your pool or spa. This helps make sure the later stps like sanitation are effective and use the minimum chemicals required There are three major factors affecting water balance, they are pH, total alkalinity and calcium hardness
Calcium hardness
Hardness is the measurement of calcium salts in the swimming pool or spa water and this will vary depending where you live. Low calcium hardness can cause damage to your pool materials. High calcium hardness levels (hard water) often leads to the formation of scale in pipe work and equipment.
Calcium Hardness Guide Measures
• Ideal calcium hardness levels are between 100 – 200 ppm (mg/l).
• If the level drops below 75 ppm (mg/l), apply Hardness Plus
• If the level exceeds 200 ppm (mg/l), apply Scale Inhibitor.
pH Measures
The pH scale has a range of 1 – 14 with 1 being very acidic, 7 being neutral and 14 being very alkaline. It is essential to maintain spa water within the 7.2 – 7.6 range which, because it is mildly alkaline, will protect equipment from corrosion and create the best conditions for bather comfort
• Ideal pH level for spas is between 7.2 – 7.6.
• If the level drops below use pH Plus
• When the level is greater than 7.6 use pH Minus
Note
pH in Spas can be hard to manage because the water is circulated quickly and the temperature is higher. These issues mean pH might vary more than in a pool
This can lead to rises in pH which reduces the performance of chlorine sanitisers like chlorine tablets. Significantly greater doses of chlorine sanitiser are then needed avoid this problem by using Bromine. Bromine works effectively over a wider pH range than chlorine Unlike chlorine, bromine keeps working in a spa for longer and so helps you minimise your spa chemicaluse
Total Alkalinity
Total Alkalinity (TA) acts as a buffer to prevent pH change. If TA levels are too low the pH will fluctuate widely.
High levels of TA will not only affect water clarity, but also make pH adjustments extremely difficult.
• optimum Total Alkalinity is 100 ppm (mg/l) When it drops below 80mg/l use Alkalinity Plus
• When Total Alkalinity is greater than 140mg/l remedy it with pH Minus to reduce it
You should definitely check your water balance on a regular basis as it is the basis for your other chemical treatments
Testing your water is easy, you just use test strips which are available online
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