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Pool Water Maintenance - Water Balance & pH order in Meridian
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Pool Water Maintenance - Water Balance & pH

Pool Water Maintenance - Water Balance & pH

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Description
Water Balance
Water balance is not such a complicated exercise. It is simply the relationships of different chemical parameters to each other. Your water is constantly changing. Anything and everything directly and indirectly affects water balance - from sunlight, wind and rain to the oil, dirt and cosmetics which may enter the water.

You will likely not change the water in your pool for many years. Continuous filtration and disinfection remove contaminants which keep the water enjoyable, but this is not water balance. A pool that is "balanced" has proper levels of pH, Total Alkalinity and Calcium Hardness. It may also be defined as water that is neither corrosive or scaling. This concept is derived from the fact that water will dissolve and "hold" minerals until it becomes saturated and cannot hold any more water in solution. When water is considerably less than saturated it is said to be in a corrosive or aggressive condition. When water is over saturated, and can no longer hold the minerals in solution; this is known as a scaling condition. So then, balanced water is that which is neither over or under saturated. The cliché that "water seeks its own level" certainly applies here. Water which is under saturated will attempt to saturate itself by dissolving everything in contact with it in order to build up its content. Water which is over saturated will attempt to throw off some of its content by precipitating minerals out of solution in the form of scale.
How do we know when our water is over or under saturated? First of all, we use a good test kit (with fresh testing reagents) to measure the chemical parameters of pH, alkalinity and calcium hardness.

Swimming Pool pH:

pH is a measure of how acidic or basic the water is. pH is a logarithmic scale from 0-14, with 7 being neutral. Below 7, a substance is defined as being acidic, while levels above 7 are said to be basic or alkaline. Everything that enters your pool has a pH value. Heard of acid rain? This is rainfall with a very low pH. The human eye, at a pH value of 7.35, is just slightly basic. This is coincidentally, in range with proper pH levels for your pool. To have pH in balance, we adjust the water with additions of pH increasers (bases) or pH decreasers (acids) to achieve the range of 7.2 - 7.8. If your testing (recommended daily) of the water shows a pH value below 7.2, the water is in an corrosive (acidic) condition, and we need to add a base to bring the pH into a more basic range and prevent corrosion. Conversely, if the pH is above 7.8, we are in a scaling (basic) condition and must add an acid to bring down the pH to prevent the formation of scale.

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Pool Water Maintenance - Water Balance & pH
Pool Water Maintenance - Water Balance & pH
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