Treatment FAQ

what pool treatment uses sodium hypochlorite

by Noelia Paucek Published 3 years ago Updated 2 years ago
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  • Calcium hypochlorite is the most commonly used pool shock with a typical chlorine level of between 50 to 80 percent. ...
  • Sodium hypochlorite is typically used in liquid pool shock treatments. It has a concentrated formula with an average sodium hypochlorite percentage of 12.5, allowing it to treat up to 20,000 ...
  • Sodium dichloro-s-triazinetrione generally has a lower chlorine level than calcium hypochlorite, at a range of 40 to 50 percent. ...
  • Potassium monopersulfate is a chlorine-free product. It is best for saltwater pools because it helps to remove chloramines, which are formed when chlorine comes into contact with sweat, dirt, oils, ...

In some countries, sodium hypochlorite is used for both oxidation and disinfection of swimming pools. When it is added to water, sodium hypochlorite increases the pH value. It is better to use chlorine as a disinfectant and an oxidizer at a pH value of 6,5. Often, acid is added to lower the pH value.

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Safety Precautions. Ingestion. As a corrosive substance, it would be best to avoid ingesting sodium hypochlorite for several reasons. When ingested, it causes severe ... Inhalation. Eye and Skin Contact. Store Your Sodium Hypochlorite Safely.

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Is sodium hypochlorite the same as pool chlorine?

In the swimming pool industry one of the most popularly chosen forms for sanitizing water is liquid sodium hypochlorite. Commonly known as liquid chlorine it is widely used in swimming pools both commercial and residential. It is a bit of a misnomer to use the term liquid chlorine.Mar 3, 2020

Which is better for pool sodium hypochlorite or calcium hypochlorite?

When considering the chemical structure of these two compounds, calcium hypochlorite contains two hypochlorite anions associated with one calcium cation whereas sodium hypochlorite contains one hypochlorite anion associated with one sodium cation. Moreover, calcium hypochlorite is more stable than sodium hypochlorite.Aug 24, 2018

Is sodium hypochlorite safe for vinyl pools?

Free chlorine

Others also avoid liquid chlorine, or sodium hypochlorite — because it can concentrate and bleach the liner if the product isn't broadcast evenly throughout the pool.

How much sodium hypochlorite do I put in my pool?

One gallon of 12.5% sodium hypochlorite provides approximately 12.5 ppm of free chlorine per 10,000 gallons of pool water. It takes 10.6 fl. oz of 12.5% sodium hypochlorite to get roughly 1 ppm of free chlorine in 10,000 gallons of pool water.May 12, 2020

How do I add hypochlorite to my pool?

Fill your bucket about ¾ of the way with warm water. One pound at a time, add the calcium hypochlorite to the bucket. Stir it gently until the sanitizer is completely dissolved. Walk around your pool, pouring the mixture into the water slowly and evenly.Jul 3, 2019

How long after adding sodium hypochlorite Can you swim?

After Shocking Your Pool

It is safe to swim once your chlorine levels are around 5 ppm or after 24 hours. It is always best to test first!

What type of shock is best for vinyl pools?

For a vinyl pool, we have two types of oxidizer that can be used safely and without having to pre-dissolve in a bucket before adding to the pool. Non-Chlorine Shock: This oxidizer is 100 percent potassium peroxymonosulfate, a mixture of salts that is completely safe to handle and store.Oct 22, 2013

How do you chlorinate a vinyl pool?

The best practice is to dissolve chlorine tablets in a bucket of water, and then pour the solution into your pool. Liquid chlorine can be added immediately, but should be poured out to very specific areas of the pool. Make sure chlorine water is immediately agitated, dispersed and circulated.

What chlorine is safe for vinyl pools?

Dichlor or liquid chlorine is the best and safest chlorine to use in a vinyl liner pool. Dichlor is fast dissolving and liquid chlorine (bleach aka sodium hyperchlorite) is fast to distribute throughout the water. Trichlor and calcium hypochlorite (cal-hypo) should be avoided as they can bleach and weaken liners.

Does sodium hypochlorite damage concrete?

When applied to concrete, bleach does not harm the sturdy material. However, it does remove spots and unwanted matter from the surface, such as mildew and moss.

Does adding sodium hypochlorite raise pH?

The presence of caustic soda in sodium hypochlorite means the pH of water increases when the chemical is added. When sodium hypochlorite dissolves in water, two substances are formed that play a role in oxidation and the disinfection processes. These are hypochlorous acid and the less active hypochlorite ion.

What is the difference between sodium hypochlorite and bleach?

The difference between sodium hypochlorite and bleach is in the consistency of the substance. Sodium hypochlorite is a powder that can be mixed with water to create bleach. Bleach, on the other hand, is liquid and is simply the finished product that is the result of combining powdered sodium hypochlorite and water.Sep 1, 2021

How to add sodium hypochlorite to pool?

It can be poured directly into the pool but, is recommended by many pool experts to first dilute the Sodium Hypochlorite in water. T he best way to add liquid swimming pool chlorine is to start in the deep end of the pool and walk it around the perimeter. You'll need to brush the pool very well after applying as sodium hypochlorite is heavier than water and will sink to the bottom and possibly stain your pool surface .

What is the best sanitizing agent for a pool?

The chemical sanitizing agent of choice for millions of pool owners is chlorine, or more specifically, sodium hypochlorite.

How long does liquid chlorine last in a pool?

Most commercial indoor pools use liquid chlorine. It seems to be more convenient to have big 55 gallon drums filled with pool chlorine. Some commercial indoor pool systems are automated which makes it even easier to have the swimming pool care consistent. Liquid pool chlorine has a shelf life of about 1 year, and after that it will rapidly degrade. Keep it out of direct sunlight or it will degrade even faster. The pool test kit of choice for professionals is the Taylor K-2006 .

How to keep chlorine out of pool?

Use heavy duty rubber gloves and goggles and keep pool chlorine out of reach of children and pets. Also, be sure to store your sodium hypochlorite away from other chemicals. Liquid pool chlorine is unstabilized. You'll need to keep an eye on your cyanuric acid level .

What is the best way to sanitize a pool?

If you need to shock your pool, or for weekly maintenance, there's really nothing better than sodium hypochlorite. Commonly called bleach, it's one of the world's most popular forms of chlorine and a perfect way to sanitize your pool water. It's known as liquid chlorine and is used in both home and commercial pools.

Why is chlorine important?

Chlorine is an important nutrient for plants and animals and provides clean drinking water to people by killing the bacteria and viruses that can make us sick. Chlorine has also been used for decades in home disinfectants.

Is sodium hypochlorite safe for swimming pools?

Sodium Hypochlorite Care and Safety. We're dealing with pool chemicals and they can be unforgiving, so the utmost care must be taken. Always take the proper precaution in dealing with pool chlorine or bleach, and for that matter, any kind of swimming pool chemical. Remember to read the manufacture’s labels.

When to add sodium hypochlorite to pool?

The ideal time to add sodium hypochlorite is right before shutting off your pool’s pump so that it will dissolve overnight and not be exposed to sunlight.

Why do you need to clean your pool filter after adding sodium hypochlorite?

Always clean your filter after you’ve added sodium hypochlorite in your pool because you don’t want to contaminate your equipment or release any pool chemicals into the air.

What is the difference between sodium hypochlorite and calcium hypochlorite?

In addition, sodium hypochlorites tend to dissolve metals such as iron, aluminum, copper, lead, zinc, magnesium, and manganese. In contrast, calcium hypochlorites dissolve organic matter like fats, oils, proteins, carbohydrates, and cellulose.

What is the chemical that kills algae in a pool?

Sodium hypochlorite acts as a liquid chlorine source by converting it into other compounds, such as sodium chloride and sodium hydroxide. These are active compounds that can kill bacteria that cause black pool algae to grow.

What is the best solution for swimming pool?

Sodium hypochlorite solution keeps your pool water safe and sparkling clean, making it easier to enjoy swimming all year long.

Why is sodium hypochlorite dangerous?

Be careful about adding more sodium hypochlorite than is prescribed because it can also irritate eyes, skin, and lungs.

Is sodium hypochlorite acidic or alkaline?

Both compounds have similar properties, but there are differences between them. For example, sodium hypochlorite is slightly acidic, whereas calcium hypochlorite is alkaline. This means that both types of hypochlorites react differently with different substances.

How does sodium hypochlorite disinfect?

Sodium hypochlorite solution in water disinfects by oxidising the protective outer layers of bacteria and viruses. The cell membrane of bacteria or the lipo-protein envelope of viruses is destroyed, spilling out the content. This process kills the microorganisms.

What is the pH level of sodium hypochlorite?

The pH level is maintained at either neutral or slightly basic level of 7.6.

Why is sodium hypochlorite kept refrigerated?

When left in the open air at room temperature, anhydrous sodium hypochlorite decomposes more rapidly because of exposure to carbon dioxide in the air. This is why it must be kept refrigerated. Indeed, lower temperatures make sodium hypochlorite much more stable, with the optimum temperature being 7°C. At this temperature, only about 1% of the compound decomposes in the course of a year.

What temperature does sodium hypochlorite decompose?

Meanwhile, high temperatures aid in the decomposition of sodium hypochlorite. In solid, crystalline pentahydrate form, the chemical decomposes at 101°C, which is also its boiling point. In an aqueous solution, high temperatures cause it to decompose into sodium chloride and sodium chlorate:

What is the chemical formula for NaClO?

Meanwhile, the hydrous crystalline form has a chemical formula that can be written as either NaOCl·5H2O or 2NaOCl·10H2O.

Is sodium hypochlorite in dynamic equilibrium?

To some extent, an aqueous solution of sodium hypochlorite is in dynamic equilibrium. This is because although it continues to decompose overtime, its ions tend to continuously react and balance the equations. For example, the hypochlorite component of the compound is in dynamic equilibrium with water in aqueous solution, as shown in the balanced equation below:

Is sodium hypochlorite a liquid or aqueous solution?

This substance exists both as a solid and as a liquid or aqueous solution . In solid form, it can either be an anhydrous (doesn’t contain water) or hydrous (contains water) compound. The hydrous form is light greenish-yellow in colour, and has an orthorhombic crystal structure, which is about 44% sodium hypochlorite by weight. Its melting point is between 25-27°C in one atmosphere.

Is Sodium Hypochlorite the Same as Chlorine?

One of the joys of having a pool in your backyard is looking at the crystal clear blue waters and knowing that it is free of germs, bacteria & algae. Regular pool sanitization, using Chlorine, is highly recommended. But is Sodium Hypochlorite the same as Chlorine?

Is Sodium Hypochlorite the Same as Shock?

Sodium Hypochlorite is, without doubt, the best chlorine product for shocking a pool.

Can you Use Sodium Hypochlorite in a Swimming Pool?

Sodium Hypochlorite is widely used in swimming pools, especially as a shock.

How Much Chlorine is in Sodium Hypochlorite?

The Available Chlorine (AC) in Liquid Chlorine of 12.5% concentration is 12%.

How Much Sodium Hypochlorite do I Add to My Pool?

The thumb rule is that 1 ounce of Liquid Chlorine will raise the level of Free Chlorine (FC) of 1,000 gallons of pool water by 1 ppm.

How Long After Adding Liquid Chlorine Can You Swim?

It is safe to swim in a chlorinated pool if the Free Chlorine (FC) level is below 5 ppm.

Recommended Swimming Pool Chemicals

Champion Liquid Chlorine (Sodium Hypochlorite) Pool Shock (12.5%) is easy-to-use, fast, and effective. This Pool Shock does not have Cyanuric Acid (CYA-stabilizer) and will not result in build-up of scale. Order from Amazon using the link below:

What to use for green water in pool?

However, if you’re shocking as part of weekly maintenance and your pool looks clean, you can use sodium dichlor , potassium monopersulfate or sodium hypochlorite.

Why is it important to shock a pool?

Pools are shocked to keep the water healthy and clean by removing algae and bacteria after heavy bather use or contamination events. In addition, pool shocking is used to eliminate harmful combined chlorine in the water.

What is MPS in swimming?

Potassium monopersulfate , or MPS, is a chlorine alternative oxygen-based shock type. A MPS shock can be used to oxidize, destroy contaminants and help chlorine operate more efficiently. Unlike both cal-hypo and dichlor, MPS won’t change your pool’s cyanuric acid levels. Known as the “shock and swim” method, MPS can be used at any time of the day. You can start swimming nearly 15 minutes after using this shock.

What is AOP in pool?

By lowering chlorine demand down to drinking-water levels, Clear Comfort’s advanced oxidation, or AOP, pool treatment system reduces the frequency you need to shock your pool. With fewer chemicals needed to achieve clear, clean, and healthy water quality, Clear Comfort’s AOP pool system reduces your time spent on balancing chemicals.

What does it mean to shock a pool?

The term shocking means to add enough chlorine to the pool or spa water to destroy all combined chlorine present in the water. In detail, the process of pool shocking means adding chlorine or non-chlorine shock to your pool in order to raise the “free chlorine” level.

How long after using a shock can you swim?

You can start swimming nearly 15 minutes after using this shock. 4. Sodium Hypochlorite (Bleach or Liquid Shock) Sodium hypochlorite, also known as bleach or liquid shock, is a “heavy-duty” type of pool shock that isn’t typically used in home pools.

What is combined chlorine?

Combined chlorine is a disinfection by-product (DBP) that forms when chlorine reacts with contaminants, like lotions, sweat, and urine in the pool water. You may want to shock your pool in certain situations, such as: After a new pool construction is completed and there is a fresh fill from any source of water.

How to use sodium hypochlorite in pool?

Using Sodium Hypochlorite In Your Pool. You can add liquid sodium hypochlorite directly to your pool through your skimmer. Then just run your pumps to make sure that it’s distributed. Just ensure that you also use CYA, particularly if your pool is located outdoors.

What is sodium hypochlorite used for?

Sodium and calcium hypochlorite are used primarily as bleaching agents or disinfectants. They are components of commercial bleaches, cleaning solutions, and disinfectants for drinking water and wastewater purification systems and swimming pools.

What is the purpose of calcium hypochlorite in water?

Calcium hypochlorite also helps fight against foodborne diseases through a process called post-harvest water treatment. In this case, calcium hypochlorite and water are mixed to various strengths with the help of chlorination systems in order to kill off all germs and keep our food supplies safe .

What is the difference between sodium hypochlorite and calcium hypochlorite?

Sodium hypochlorite solutions are clear, greenish to yellow liquids with an odor of chlorine. Calcium hypochlorite is a white solid that readily decomposes in water releasing oxygen and chlorine. It also has a strong chlorine odor. Neither compound occurs naturally in the environment.

What is the main ingredient in bleach?

We mentioned that sodium hypochlorite is the main ingredient used in bleach. So, anywhere you’re using bleach, you’re using sodium hypochlorite i.e. when you’re cleaning your toilet.

What to wear when you are exposed to calcium hypochlorite?

Note: make sure that your wearing safety goggles and gloves, closed shoes and long-sleeved shirts and pants. You want to cover all body parts, as exposure can cause irritation. Now that we’ve briefly covered calcium hypochlorite, let’s jump into sodium hypochlorite – not literally.

How often should I shock my pool?

To keep your pool sanitized, you need to shock it regularly. Therefore, you should shock your pool regularly. Instance during which you would want to shock your pool include after heavy rain, after increased use i.e. pool party, and if your water levels have significantly changed.

What is the best solution for saltwater pool shock?

Instead of chlorine, some pool shock treatments use potassium monopersulfate, a more effective solution for saltwater pools. You’ll likely choose a product based largely on whether your preferred form is liquid, powder, or tablet, but you should also take into account the current pH level of the water.

What is a shock tablet in a pool?

Tablet pool shock treatments are great for users looking for low-maintenance solutions. By placing a pool shock tablet in the pool’s filter basket or in a chlorinator, the chemicals can be gradually mixed throughout the pool as the tablet dissolves. This slow-release feature ensures the tablet doesn’t damage the pool, with each tablet containing 93.6 percent sodium dichloro-s-triazinetrione, which includes up to 84 percent chlorine.

How many gallons of shock for pool?

Instead of premixing powders, placing tablets in chlorinators, or waiting for the pool shock product to dissolve, users will find this liquid option easy to use and suitable for treating between 20,000 gallons and 100,000 gallons of pool water.

What is the best pool shock?

Calcium hypochlorite is the most commonly used pool shock with a typical chlorine level of between 50 to 80 percent. This pool shock is made for quick, potent pool water treatment. After treatment, the heat from the sun turns excess chlorine into a gaseous state, allowing it to escape in the open air.

How does pool shock work?

Pool shock treatments are specifically formulated to kill microorganisms by rapidly increasing the chlorine level so water will be clean and healthy for the first swim of the year. To choose a product, consider pool shock type, chlorine level, and other important factors detailed below.

What does shocking a pool do?

Shocking a pool involves raising the pH level rapidly to a point where the solution will kill any microorganisms in the pool. After this initial pool shock, the chlorine level must be maintained weekly, so it’s a good idea to choose a pool shock that’s easy to use.

How long does it take for a pool shock to dissolve?

Tablet pool shock treatments have the slowest applications. Each tablet will usually take about 1 to 2 hours to completely dissolve in the water and it can take up to 48 hours for the pool to be ready for safe swimming.

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