Water Quality Indexes

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April 3, 2024

Water Quality Indexes

Do you know the importance of water? Do you care about the quality of the water in your pool? Do you know what method is used to measure the quality of the water in your pool? One of the decisive elements to keep your pool fit for use is to know the appropriate parameters that the water must have.

Pool water has a corrosive or fouling character, it must be controlled to avoid problems in pipes, tanks, surface, equipment, accessories, walls and finally health problems to the users.

Let’s remember our previous article explaining the elements to keep in mind to maintain a clean swimming pool https://acortar.link/u8sOOQ

One of the vital elements to take into consideration is the Langelier Saturation Index (LSI), its application indicates the stability of the water in terms of calcium carbonate saturation levels, but how do we measure it?

Maintaining the water balance of your pool will help you avoid money and problems in your equipment in the short, medium and long term.

The result of the application of the Langelier Saturation Index (LSI) formula should be between -0,3 / 0,3 for a healthy pool. If the index is 0, the water should be balanced and neutral water suitable for use.

If it presents a negative result the water will be under saturated with a tendency to be oxidizing, corrosive. If it is positive, the water will be over saturated and incrusting, with a tendency to be oxidizing and corrosive.

If it presents a negative result the water will be under saturated with a tendency to be oxidizing, corrosive. In the opposite case of being positive it will be a water over saturated and incrusting with presence of salts.

Currently there are free applications available to all technology users where they can measure the ISL, but do not forget that it is important that an expert can analyze the final reading and offer appropriate recommendations to the specific case of your pool.

(https://play.google.com/store/apps/details?id=com.elitecrest.orenda&hl=en)

Very well, it is time to know which are the variable elements that must be taken into account in order to calculate the Langelier Saturation Index (LSI).

pH: of all the elements this is the most variable since its value tends to decrease or increase easily, it is also the most famous in the field of pool experts. When your pool expert does the ISL calculation he will only take the pH value and will not try to correct it on the spot. This variable can be acidic when the pH is low or alkaline when the pH is high.

Temperature (ºF): this element is important in terms of chemical reactions in the water as they affect its speed, i.e. when the temperature has a low value the water tends to be aggressive or on the contrary if the temperature is high the calcium tends to be suspended.

Calcium hardness: here we see how much calcium we can find in the water we are using. If we get an oversaturation of calcium in the water we will be able to observe clearly scale formed in our pool, this measure of concentration plus the alkalinity serve to regulate the pH.
Alkalinity: To measure the ISL the alkalinity of carbonate and bicarbonate is used, what many experts call corrected alkalinity, this precisely helps to obtain precise results since the water of the swimming pools has chemical levels that differentiate them from other types of water that are also measured with the ISL.
Isocyanuric Acid: There is an important factor that is used to protect the chlorine in swimming pools this is cyanuric acid (CYA), if it is used in your pool water the cleaning professional must adjust the appropriate level knowing the pH of the water.
Total Dissolved Solids (TDS): this index is the measure of everything that is in the water dissolved or floating. It can be various metals, chemicals, calcium and others and is measured in parts per million.

At the beginning of the 20th century, Dr. Wilfred Langelier analyzed water saturations and created the Langelier Saturation Index (LSI), a tool that has been so useful for all pool maintenance professionals.

Measuring the ISL makes it possible to prevent many problems and damages to pool owners, rest assured that in @miazopoolandhome we are experts in balancing and improving your pool water.

You already have the basic knowledge, let’s get busy!

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Water Quality Indexes

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