Swimming Pool Shock: Pool Care and How to Shock a Pool


Swimming pool shock step by step

Shocking a pool is one of the ways to keep pool water clean and safe by adding three until five times the average amount of chlorine or other chemicals to the pool water to extremely raise the chlorine level for a short period.

This method works to remove bacteria and anything organic, ineffective chlorine amounts, and increase the availability of effective chlorine. Every pool owner should be familiar with swimming pool shock as it’s an important common maintenance step.

Best Pool Shock

There are three most common pool chemicals used for utmost swimming pools which are chlorine shock, liquid shock, and calcium hypochlorite shock. Chlorine is most widely used for pool sanitizer. It is in the form of liquid, tablet, and granular.

Tablets are the easiest for creating a constant supply of chlorine. The use of chlorine is essential to be used when the pool is placed outside and is exposed to sunlight. Meanwhile liquid shock, the strength ranges from 5% store brands to a 12.5% commercial strength and mostly used for many industrial purposes.

The characteristic of liquid shock is fast dissolving, adds no calcium or cyanuric to pool, and no residue. But the liquid shock has various cons side which is harder to buy, to store and to use, it has very high pH level as well.

Another benefit using liquid shock is that you won’t have any residue, so you do not have to vacuum or brush the leftover shock off the bottom of the pool. The last is calcium hypochlorite (cal-hypo). It is mostly found in granular and tablet form.

It should never be added through the pool skimmer, only broadcast or pre-dissolved and then pour them around the pool. Bear in mind that all pool chemicals have the huge potential to be dangerous if improperly mishandled.

When to Shock a Pool

When to Shock a Pool: Why and How Is It Done?


Shock the pool when swimmers are using the pool and the temperature is good enough for you to shock. Some experts suggest shocking a pool once a month at a minimum. Twice a month is recommended, if the water is not cold enough (spa pool).

Some experts also suggest shocking pools more than once in a week especially after huge rain or sunny weather. The other best time to shock swimming pool is after the sun has set.

The reason is that it will avoid the sun’s rays from damaging the chlorine or other chemicals and guarantees that the majority of the chemicals are not disturbed to shock the pool.

How Often Should You Shock a Pool

You should shock your pool regularly. Try shocking your pool when swimmers frequently using the pool. Shock your pool as frequent as possible.

How to Use Pool Shock Treatment

To use pool shock treatment, you must prepare the pre-shocking preparation. Start by dissolving the chemicals of pool shock. You must do this before inserting the shock chemicals to the pool, and all kinds of chemicals should dissolve quickly as they are in granular form.

  • Begin by filling a 5-gallon/19-liter bucket with pool’s water.
  • Then pour the granular pool shock little by little in the bucket filled with water.
  • Bear in mind that never insert the water to a chemical instead always insert chemicals to the water.
  • Stir up the bucket. Shake the water for more minutes to disperse the chemicals.

Next thing to do is adding the pool shock chemicals. Prepare the filtration system. While it’s running, slowly pours the dissolved shock in the bucket directly.

  • Begin by slowly pouring until that all of the water from the bucket is brought into the pool. By pouring it slowly, it prevents the water to be splashed on your skin, any surfaces, and clothes, which sometimes can injure you.
  • Pour as close to the water’s surface if you can.

If you still find the dissolved shock water from the bottom of the bucket, try filling the bucket with water.

Read also : 40 Uniquely Awesome Above Ground Pools with Decks

Pool Shock Calculator

Pool Shock Calculator helps you keep calculate your pool's chemical needs


Pool shock calculator will help you with all the calculation that might appear while you are maintaining your pool’s water chemistry in the balance. It tells you how much of each chemical to pour.

How Much Chlorine to Shock a Pool

The basic calculation is to bring your pool chlorine level up ten times per a 10:1 ratio or know as super chlorination or breakpoint. Go all out and pool shock it all at once for not over a few days or hours, when you are going to super-chlorinate your pool.

It will cause you a problem when you are skimping or using less on pool chlorine. Not only that, the bacteria and the chloramines will then get way stronger and more resistant to future pool shocking. You better use your pool chlorine and ‘slam it’ to prevent bacteria and contaminants from returning.

Cloudy Pool Water After Shocking

Cloudy pool water after shocking, Why & How to Remedy


The reason why you encounter cloudy pool water is that there is an imbalanced amount of pool chemicals such as high or low chlorine levels or any other chemicals you use in your pool. Without the correct chemical balances, unwanted particles multiply in the water – just an annoying eyesore!

To clear cloudy pool water is simply by using a pool clarifier. It works by gathering the tiny particles that are making your pool water cloudy and binds them into larger particles so that the filter can absorb them up.

If you want to get the job done faster, try using pool flock, a chemical known as a Flocculant. It can transform the cloudiest pool into crystal clear for just an overnight, but you will need to work hard to get the desired results.

Read also : Above Ground Pool: Installation Cost and How to Install

Green Pool Water After Shocking

Here Is how to clear green pool water after shocking


Similar to cloudy pool water, a green pool is caused by an imbalanced amount of pool chemicals. However, there are various steps to clean a green pool.

  • Determine whether or not the chemistry of your water is too far gone
  • Test the water to identify the pH balance
  • Shock the pool
  • Pump and filter to reobtain the correct balance
  • Brush and Filter
  • The last step, maintain the right balance

Having a pool means you need extra efforts to maintain its cleanliness and safety. You surely don’t want to swim in a dirty pool, right? So make sure to shock your pool regularly.

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