Useful Tips

Turbid water in the pool


Most often, the first and main reason on warm summer days is the appearance and propagation of very small algae, which fill the water column to the very bottom, settle on the walls of the tank, they can even overgrow the filter. It is better to deal with such misfortune with preventive measures, avoiding even signs. Other microorganisms that simply add turbidity can give the same effect, but the color of the liquid may be whitish (milky), yellowish or brown. By the way, algae or bacteria can be brought into the pool by the swimmers themselves, as well as by various beach accessories and swimming facilities. Also, microorganisms can get into the water with amphibians, insects, with various debris carried by the wind.

Turbid water in the pool

Favorable conditions for the propagation of algae and most bacteria are created naturally quite often. For example, if the acidity of the water is very low or neutral, it becomes a safe habitat for many microorganisms. Ideally, the pH should not be lower than 7 units, or better, 7.2 or up to 7.4. Also, excessive heating of the water by the sun can lead to a sharp increase in the number of small algae, and a lack of lighting - to the multiplication of bacteria. And, of course, turbidity of the water can begin in those cases when the pool is not used for a long time for its intended purpose, water is not added to it and the closed-loop filtration system is not turned on. Especially after getting into the trash tank.

Another reason for the occurrence of turbidity is poor quality water, especially in combination with low-cost filter cartridges or in general in the absence of cleaners. For example, this can happen when filling a pool from a well where the mineral content is excessively high, or if water with rust is supplied through central communications. In some cases, when there are no good filters, the smallest solid fractions of various rocks, sand or even peat particles get into the pool. And, of course, we should not forget about those cases when the rules for the use of water purifying substances are violated - from some reagents with a chlorine content the water can also become cloudy.

How to change pH - regulate acidity

It is far from always the reason for the turbidity of the water can be harmful to humans, but in some cases it is better to be safe and take measures to clean the pool. And first of all, attention should be paid to the acid-base balance of the liquid. An obvious sign of its violation can be, along with turbidity, the abundant occurrence of foci of rust on metal structures in the tank, as well as on its walls and bottom, if it is itself made of steel. This will mean that the acidity of the water is extremely high, and it is imperative to lower the pH level by filling it with hydrogen.

Testing for ph water

To find out what acidity indicator is currently in your pool, you just need to purchase special tests in the form of litmus strips and take a sample of water 5-10 centimeters below the surface. It is advisable to check at the maximum distance from the filter, on the opposite side of the tank. We verify the color in which the piece of paper, placed briefly in the sample, is painted, with the attached table and find out the level of acidity. Next, you need to purchase special drugs, which, depending on the situation, will either increase the pH or lower it. We recommend using proven reagents, about which there are many positive reviews from other pool owners - any product in the water can cause allergies or other troubles for swimmers.

Poison in small doses can be beneficial - chlorinate water

The first and main weapon in the hands of the zealous owner of the suburban area in the fight against bacteria and algae that occupied the basin is chlorine. Moreover, it’s often not clean, but as part of special products that are available for clarifying water. The fact is that they contain certain stabilizing substances, in particular cyanuric acid, due to which the evaporation of chlorine under the influence of ultraviolet radiation is significantly slowed down. The daily recommended dose is about 10 grams per 10 cubic meters of full capacity. Thus, the drug can act for a rather long time, gradually destroying the organics by which water is saturated with oxidation. Often, in order to get rid of strong contaminants, a loading dose within 200 grams of reagent per 10 cubic meters is recommended.

Chlorine for the pool

Care should be taken when using stabilizer formulations, since the same cyanuric acid tends to accumulate, and as a result, the next chlorine additives are less effective.

In some cases, for example, when after a long absence, the owners of a country house find a pool with pretty greenish muddy water, it is necessary to take emergency measures. Compositions with stabilizers are not suitable for the reason that they act rather slowly. Therefore, it is better to use a fairly popular bleaching agent. White, whose main component is sodium hypochlorite. In fact, this is a rapidly evaporating chlorine, but at the same time it enters into the oxidative reaction with organic substances in the shortest possible time, destroying both bacteria and algae. Its duration is within 30 minutes, then it partially passes into a gaseous form, and partly precipitates with foreign particles.

When microorganisms develop in large quantities in water, bacteria and viruses that are dangerous to humans can be among them. Therefore, among other things, chlorine is also good because it destroys most types of bacteria, as well as a number of viruses. However, this substance has certain disadvantages. For example, some people have an allergy to it, and if it gets into the mucous membranes, water with chlorine can cause itching and redness, especially with a high concentration of cleansers. Evaporating chlorine can negatively affect the lungs. And finally, this chemical element with prolonged contact contributes to the destruction of metal and concrete, as well as wood.

Chemistry for the pool - send dirt to the sediment

If you are allergic to chlorine or you simply do not want to smell the pungent odor inherent to it, there are other formulations to combat the suspension of foreign particles and microorganisms. The most popular are coagulants and flocculants, which are active organic polymers that react with any fractions trapped in water. A sign of their action is rather large flakes, through which foreign particles are deposited, and in the future it remains only to use a vacuum cleaner. These polymers are similar in that they are not sources of pungent odors and are safe for skin and mucous swimmers, and also do not affect the acid balance of water and do not contribute to the accumulation of dissolved metals. But they work a little differently.

Coagulants for the pool

Coagulants are most often used in cases where high-quality filter systems are installed. These polymers are poured into water, after which it needs to be mixed well, and it is better to drive the liquid throughout the tank. The easiest way to achieve this is in a round pool, taking an ordinary shovel, lowering it into the water, walking several times around the side. Thus, the coagulant mixes well. It is extremely important to turn off the filter and stop the flow of fresh water while the reagent is operating. Next, the polymer will begin to electrolytically affect the particles, changing their charge to a neutral one, which will allow collecting individual fractions into flakes that precipitate. It is noteworthy that the resulting formations are still too small for some types of filters and are well cleaned only with sand.

Flocculants can also be used in cases where the treatment systems are equipped with coarse filters. However, these polymers are not compatible with ordinary inexpensive cartridges, since they are quite viscous and quickly clog the cells. For the same reason, it is extremely undesirable to immerse in water until the flocculant effect is completely over. Unlike the coagulant, this polymer covers small particles, linking them together, due to which quite large flakes are formed. It can also be used in combination with a coagulant, which will allow you to collect together those particles into which the suspension combined after neutralizing the charge. The action of organic polymers can be observed for several days, as new portions of water are added to the pool, which will be noticeable by the appearance of sediment flakes.

We do without chemistry - ozone water treatment

When the air is saturated with oxygen, freshness is always felt, especially in contrast to urban gas pollution. And ozone could be considered the highest purity of the ecology of the environment if it were not an extremely unstable gas. It occurs in two cases - either after air has passed through a strong electric corona discharge, the so-called arc, or after oxygen has been treated with ultraviolet light. After 40 minutes, the concentration of this gas is reduced to a quarter of the original amount. But, most notably, ozone is harmful to microorganisms, which is why it is often used for processing rooms. Also, by oxidizing organic particles, it contributes to their destruction, due to which this gas was also used in water purification in pools.

Pool cleaning ozone unit

I must say, the installation for ozonation is much more complicated than a conventional filter. However, the installation of additional units justifies itself already by the fact that you can almost completely abandon chemistry for the pool, only occasionally allowing chlorination for preventive purposes. The water purification system, which is often closed, includes, first of all, an ozone generator, from where gas is supplied to the general circuit and delivered to the contact tank together with water. Here the whole process of neutralizing the liquid from microorganisms and organics takes place. Further, water with a certain amount of ozone enters the pool bowl, and the excess gas is discharged into the destructor, being converted into oxygen in it.

Ozonation can be either full or partial, it depends on the power of the generator and the complexity of the filtration system. For a large pool, in which only 5% of the volume is often updated after each washing of the filter capsule, you can set the mode of full ozonation. This option is not economical, but allows you to reduce the amount of chlorine needed to maintain cleanliness. For small bowls, partial saturation of water with gas is sufficient, since with a small volume and with a sufficiently powerful pump, the entire volume will pass through the circuit about 4 times per day. As a result, all the liquid will be exposed to ozone, which will completely abandon chlorine for the entire swimming season.

Pool cleaning - we get rid of the precipitate

So, you used one of the above methods, and the turbid suspension, whether algae or organic or mineral particles, turned into flakes that float on the surface or sink to the bottom. Now you need to very carefully get rid of sediment, as well as, possibly, plaque on the walls and bottom of the pool bowl. For this purpose, a special vacuum cleaner is used. Usually it is equipped with a long hollow rod connected to the filter, to which the bottom brush is attached. This device can remove sediment from the bottom without going into the water, but only passing along the sides of the bowl. Also, a skimmer for collecting garbage is often used.

Pool cleaning from pollution

For the same purpose, special cleaning robots are used, that is, automatic vacuum cleaners that do not require operator intervention. They are also often connected through a long corrugated hose to the filtration system, and receive power through a securely insulated flexible wire. The movement is provided by small wheels or tracks with large ribs for high-quality hitching with the bottom. The disadvantage of bottom robots is that they are not able to process walls, although some models are equipped with a similarity of rods with brushes. There are also types that are able to crawl along the sides of the pool bowl. No robot can cope with a dense layer of plaque, manual cleaning is necessary here. As a budget alternative, a submersible pump can become a vacuum cleaner, which will help to absorb all the sediment from the bottom.

How to check pool water

The turbid pool environment, and sometimes the unpleasant odor from the water, are the most common problems that occur with these reservoirs. But before choosing a method of eliminating turbidity, you need to correctly determine the cause of its occurrence. To do this, check the pool water. For this purpose, you can use portable devices and tests that you can buy in stores in your city.

It is best to check not one indicator of the aquatic environment, but several:

  • The acidity of the aqueous medium (pH). The norm for this indicator should be in the range from 7.0 to 7.4.
  • Check the performance of the filter device. If the sand filter is clogged, backwash it, and you can fix the contamination of the cartridge filter by regular washing.
  • It is also worth checking the effectiveness of the water treatment system. To do this, you need to calculate the operating time of the filtering device, based on the capacity of the pool. For example: a filter with a capacity of 6 m³ / h is used on a pool with a volume of 24 m³. Thus, the filter operating time is calculated by the formula: (24: 6) x2 = 8 hours
  • Clean the coarse filter devices in the pump and skimmer.
  • Also, to prevent turbidity, the water in the pool should be periodically replenished with fresh water in an amount equal to 5% of the total. Such replenishment of water should be performed after each self-cleaning procedure of the filter.

Turbid water in the pool: reasons

As a rule, the appearance of turbidity indicates the need for cleaning the pool. Otherwise, it can lead to even bigger problems and harm your health. Usually, all the causes of turbidity in a swimming pool can be divided into two groups:

  • natural causes
  • consequence of improper care.

The reasons for the first group include the following situations:

  1. If natural debris (leaves, poplar fluff, animal hair, plants, dust and dirt) enters the pool, the water becomes cloudy.
  2. If cosmetics, hair, and human waste products get into the water, water will inevitably deteriorate.
  3. A warm aquatic environment is a great place to breed bacteria that can cause clouding of water.
  4. Lack of sun exposure.
  5. If the pool has not been used for a very long time, then the water may become cloudy.

The following can be attributed to the group of reasons associated with improper care:

  1. If the pool is cleaned and the filter equipment is replaced irregularly, this will lead to damage to the aquatic environment.
  2. Reducing the time of filtration of the aquatic environment.
  3. If the bottom and walls of the pool are not cleaned, then over time harmful bacteria that spoil the water take root there.
  4. With an incorrectly calculated dose of pool care chemicals, it will be ineffectively cleaned, leading to further problems.

Turbid water in the pool: what to do

There are many varieties of turbidity in the aquatic environment. In the table below we will examine each situation in detail, name its causes and tell you what to do.

A kind of turbidity of the aquatic environmentWhat could cause the problemYour corrective actions
Turbid aquatic environmentTypically, this situation occurs due to poor filter performance. Organic impurities, salts and colloidal particles enter the water.To combat turbidity, you can use a liquid substance to chlorinate water, and coagulation using highly flocculating agents will also help. To increase the efficiency of filtration, it is better to turn on the device for a period of more than a day
Dregs of various shades (greenish, reddish or brown). Brown spots form on the walls of the tankIt occurs if the concentration of soluble manganese, copper and ferrous salts exceeds the normYou can solve the problem by leveling the acid-base balance of the medium with a stabilizing drug. You can also add flocculant to filter cartridges. A thorough washing of the thickets, as well as powerful filtering of water will help
Turbid greenish water and thicket covered with mucous coatingThe problem arose due to the increased reproduction of algae and lack of algaecide in the aquatic environment.To fight, you need to clean the bottom and walls of the thicket from algae, rinse the filter, chlorinate the water, introduce two doses of algaecide into the water, add flocculant to the cartridges and filter the water thoroughly and for a long time
Turbid water, smelling strongly of chlorine (pain in the eyes when bathing)Концентрация свободного хлора понижена, зато превышено содержание связанного хлорирующего веществаНужно выровнять кислотно-щелочной баланс водной среды и выполнить усиленное хлорирование воды
Обильная ржавчина на металлических деталях конструкцииКачество воды в бассейне характеризуется повышенной кислотностьюНужно стабилизировать рН водной среды, используя препараты для повышения водородного компонента в воде
In winter, the open bowl became dirty, algae formedThis situation arises due to the fact that the owners did not prepare the pool for conservation in the winterTo combat such dregs, you need to clean the pool using special tools for pools open in winter. It is also necessary to apply means from sticking lime and prevent the growth of algae. They should be used before winter.

If you want to control the water in the pool in a modern laboratory, you can order a full analysis of the water environment in our organization. To do this, you need to call us on the phone number listed on the site and leave a request. Also, by telephone, you can specify the cost of services.