How To Regulate the PH of a Pool.

The pH level of the water is a very important value for safe swimming and enjoying clean, crystal clear water.

Knowing how to adjust the pH levels of a pool is very important for the safety of swimmers. Along with chlorine, pH is a fundamental element for the water to be clean and clear.

But, in addition, keeping the pH at the appropriate level prevents the formation of microorganisms such as bacteria and fungi.

The pH is an index that indicates the acidity or alkalinity of the water. Normal values ​​should be between 7.2 and 7.6. This index must be measured together with that of chlorine since both the pH and chlorine are responsible for making the pool water suitable for swimming. Most experts agree that the ideal value for chlorine is 1 ppm (that is, parts per million) and the recommended alkalinity level is 125-150ppm.

If the chlorine content is high you do not smell anything or see anything suspicious in the water that alerts a person to it, because the chlorine does not smell. What smells is the reaction of the chlorine to sweat or urine, which causes the appearance of chloramine, which is highly toxic and dangerous to a person’s health.

Therefore, if the pH level is not adequate and the chlorine is high, the damage to a person’s health is serious.

For its part, alkalinity plays a very important role in controlling the pH, because if it is not correct, you will not enjoy swimming because the water will not be clean and clear.

Therefore, whether the pH is above ​​or below the normal values, the problems it causes both in the water and in our body’s is serious. Hence, it is necessary to check its levels frequently with various pool treatments.

What will happen if the pH level is below the recommended value?

If the pH value is below 7.2, the water will be acidic. The symptoms of a swimmer are itching and stinging of the eyes and nose, dryness, irritation of the throat, stinging and itching of the skin, irritation, and dryness, appearance of eczema, or redness of the skin can appear.

But not only does your body suffer. The pool equipment can corrode by the acidity of the water, especially those metal parts and those made of cement. It is also normal for the mosaic tiles to detach themselves from the walls and bottom of the pool. They could end up floating or be found at the bottom of the pool. This is not safe for a swimmer who could cut themselves while swimming.

What will happen if the pH level is above the recommended value?

If the pH value of our pool is above 7.6, the water will be alkaline. The symptoms of a swimmer are dry and irritated skin. But the biggest problem is the water, which will become cloudy, even greenish, as the algae start to appear. Even if you try to raise the chlorine levels to eliminate them, it will be impossible if you do not regulate the pH level first.

As if that were not enough, the high pH will promote the formation of lime deposits in the pool water. These lime deposits will be embedded in the pipes and other installations, affecting their functionality. The lime will also stick to walls and floors, affecting the appearance, and cleanliness of the pool.

Therefore, to know if the pH level is high we will have to measure it with a test kit that measures both the pH and the chlorine in your pool.

How to raise the pH level of a pool

If the pH level is low, you will have to use ph UP that you can buy in any pool store. There are solids, liquids, and granules and their function is to reduce the acidity of the water.

How to lower the pH level of a pool

If the pH level is high, you will have to make use of a pH DOWN, which comes in the form of both granules and liquids. With the use of the pH DOWN the alkalinity falls and the pH increases in value.

How to make your pool water crystal clear

To ensure that the water in your pool is clean and clear, it is important that the pH level of the pool water is correct, but also that of chlorine. How do you achieve that? By checking the levels regularly. It is important to know that there are aspects such as the effects of the sun, the number of people who are swimming at a certain time, and the remains of sunscreen in the water that destabilize these values. Therefore, it is essential to frequently measure the pH and chlorine levels in the pool.

Can You Swim In A Green Pool?

The question you are asking your self is can I swim in a green pool? The answer is NO. In this article, I will explain why pool water turns green and what that water can do to you if you swim in it.

Why Does Pool Water Turn Green?

1 There is an imbalance in the PH levels of the pool water.
2 The Chlorine levels are too low.
3 The alkalinity levels are too low.
4 The Oxidized Metal quantities example copper is too high. (High acid levels, Metal Components in pool equipment, Copper heater elements)
5 Excessive quantities of Pollen are in the water.

Here’s Why You Should Not Swim In A Green Pool

When your pool is green that means there is an imbalance in the PH levels of the pool. If the PH levels are out this means that the pool water is not sterilized.

When the pool water is not sterilized there is an opportunity for algae, bacteria, and pathogens (microorganisms that can cause disease) to be present and grow.

If this is the case, then if a swimmer has an abrasion on their skin, there is a potential for infection and a possibility of incurring a rash or folliculitis (inflammation of hair follicles).

If the pool water has any form of algae and bacteria in it, it will be the ideal breeding ground for mosquitoes and other insects that thrive in these conditions.

Excessive amounts of oxidized metals can turn a swimmers’ hair green and there is a good possibility that your pool walls will be stained.

High levels of the copper content in the pool water can irritate your mouth, eyes, and nose, cause headaches, nausea, vomiting, stomach cramps, dizziness, and diarrhea.


It is not advisable to swim in a pool with water that is any color than clear blue. There are too many health problems that a person can incur from swimming in a green pool.

Rather sort out the PH levels first. Get the pool water crystal clear so that you and your family can enjoy the pool with no issues.

How To Raise Low Chlorine Levels In Your Pool

Maintaining the correct Chlorine level in a swimming pool is important. If the level drops too low then there is a possibility of Bacteria and Algae Growth in the water.

The correct level of Chlorine in a residential swimming pool should be between 1-3ppm.

If the level is below 1ppm then there is no sanitizer to fight and prevent bacterial growth, which gives the swimming pool a greenish color and is unsafe to swim in.

How To Raise Low Chlorine Level In Your Pool

A thorough clean out of the pool pump basket and weir baskets, a thorough brushing of the swimming pool walls, steps, ladders, and the floor is necessary to get the dirt and bacteria mixed with the water.

Remove leaves and heavy dirt from the pool bottom. Then backwash the pool for 2 minutes and rinse for 20 seconds. This will clean the filter sand, so it is ready for the main filtering of the dirty water.

Then test and correct the PH level of the swimming pool water. The PH level for a Marbelite Pool should be between 7.2-7.6 and a Fiberglass Pool 7.0-7.2.

If the PH level is less than 7.2 in either a Marbelite or Fiberglass Pool Add HTH Soda Ash.

If the PH level is greater than 7.6 in either a Marbelite or Fiberglass Pool Add HTH Easy Acid.

When the PH level is correct then it is very important to also check and correct the Total Alkalinity of the swimming pool water. Total alkalinity is measured by its concentration in parts-per-million (ppm), and the ideal range is between 80-120ppm.

If the Total Alkalinity is low then Add HTH Alkalinity Up. 1kg of HTH Alkalinity Up should raise the Total Alkalinity by approximately 10ppm.

If the Total Alkalinity is high then Add HTH Dry Acid/Easy Acid. Never add more than 250g of HTH Dry Acid/Easy Acid at any one time.

With both the above levels corrected. HTH Granular and Mineral soft can now be added to the swimming pool water. If the pool water is excessively green and it has a sign of green algae then HTH Shock It can be used instead of or with the HTH Granular.

With the pool pump on and set on filter. Add 3 x the normal dose of HTH Granular plus 1 bag of HTH Shock It. Or just add 1 bag HTH Shock It. Add these chemicals around the sides of the pool in the early evening.

Test and correct the PH levels every 12 Hours until the swimming pool water is clear and the Chlorine Level is between 1-3ppm.