Pool/Hot Tub Water Balancing – Kingston Pools and Hot Tubs – Knapp’s Pools and Hot Tubs Inc.

Wondering about the ‘why’s’ of pool and hot tub water balancing.  Is it necessary.  Absolutely and this is why.

If your water is out of balance it makes it difficult for chlorine to do it’s job – killing present bacteria.

That’s why to achieve a healthy pool or hot tub, sanitizing and balancing are equally important.

Total Alkalinity

In simple terms, total alkalinity refers to how much alkaline is in the water.  Total alkalinity and pH work together.   High alkaline water leads to high pH.  Low alkaline water leads to low pH. Therefore the importance of testing your alkalinity before adjusting your pH is absolutely necessary.  The right amount of alkalinity in the water helps to keep your pH stable  when it’s not at the right levels your pH will bounce and your water can become acidic or alkaline.

Swimming Pool Water pH Levels

Keeping your pH levels within the proper range is not only important for swimmer comfort, it’s also important for keeping your equipment and pool finish in good condition. pH refers to the acidity or baseness of your pool water. All you need to remember is that a proper pH level is around 7.4 to 7.6 on a pH test kit’s numeric scale. 0 to 7 reflects a low or acidic pH. 8 to 14 means the pool has a base pH level or high alkalinity. Low pH readings mean your chlorine will dissipate a lot quicker.  High pH levels make chlorine inactive which is why you want to keep your pH balanced.

Calcium Hardness

Anyone who’s ever washed their hair in hard water knows that hard water doesn’t do much for getting up a good lather. But in your pool, just the right amount of calcium is essential. Too little and your plaster can erode. Too much and your water could become cloudy, scale could form and stains might start.


Stabilizer is to chlorine like your home’s insulation is to keeping in hot or cold air – it helps retain your chlorine longer just as insulation helps retain heat or cooler air in your home longer.   Stabilizer is even added to some chlorine compounds to protect them from the breakdown effects of sunlight. When your stabilizer level is low, you’ll use a lot more chlorine. When it’s high, you may need to dilute your pool water to bring it back into the 30 – 50 range

Total Dissolved Solids (TDS)

Like calcium, there are many other dissolved elements in pool water. Unless it’s distilled, all water contains dissolved minerals.  As pool water evaporates, minerals remain behind and become concentrated. The more concentrated these minerals become, the harder it is for chemical additives to work and stains can form. If you have 3000 ppm or more of total dissolved solids or TDS, you may need to drain some water and add fresh water.  All that being said, if you have a salt water pool you will find that the ppm increase due to the salt within the pool water.


Posted in Hot Tubs, Pools

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