How long does it take for shock to work?

Asked by: Thomas Richards

How long does it take to shock a pool? The actual process shouldn’t take more than an hour, but depending on the product used, it could be up to 8 hours before you can use it.

How long does it take for shock treatment to work?

Heavy shocking with granular chlorine will generally require 24-48 hours before the chlorine level has dropped to safe swimming levels (below 5 ppm). Lithium and Non-Chlorine shock labels typically allow immediate swimming, but check the package label, to be sure.

How long does it take for pool shock to clear?

Always run the pump when shocking the pool and allow it to circulate for 24 hours. The water should then be a blue or cloudy blue color. Test the water 24 hours after shocking and start adjusting pH and alkalinity levels. The chlorine will still be elevated, but over a few days, it should stabilize.

Can you over shock a pool?

Can you put too much shock in a pool? SKIMMER NOTES: It’s unlikely but it could happen. It would take a lot of shock to really make the water unsafe for swimming. The best way to make sure you’re safe to swim is to test your pool water and make sure free chlorine levels are between 1-4ppm for healthy swimming.

How long should I run my pool pump after shocking?

It is a question a lot of pool owners have and a question that we have the answer to! A pool filter should be run for a minimum of 6 hours after shocking a swimming pool. This is to allow the filter to clean the water and give the shock enough time to fully mix with the pool water.

Will pool shock raise pH?

It will slightly raise your pH, so make sure you adjust pH while using it. As the name implies, it will also raise your calcium hardness levels in your pool slightly. It is sold in granular or in pucks/tablets. A close relative of calcium hypochlorite is sodium hypochlorite, commonly known as bleach.

When can I add chlorine after shock?

You should wait one hour per pound of shock product added, and then test the water to confirm the pH and chlorine are in the proper range before letting anyone enter the pool. As a reminder, you want your pH to be between 7.2 and 7.8ppm and your free available chlorine to be 1-4ppm for safe swimming.

What happens if you swim after shocking pool?

What Happens If You Swim In A Shocked Pool? If you do not wait for the chemicals used to shock a pool to totally dissolve then you could be placing yourself in serious danger by swimming in it. At the minimum, you will feel itchy skin and eyes because of the chemicals present in the water.

Can you swim 12 hours after shocking pool?

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!

Should you vacuum pool after shocking?

However, after shocking the pool, you shouldn’t vacuum for at least 24 hours. Running the water pump during this period will allow the shock to do its job.

Should I brush pool before shocking?

Before you start pouring shock in the pool, the first step is to brush the sides and floor of your pool to loosen all the algae. Doing this breaks the skin and allows the pool shock to more easily kill the algae. Once you’ve done this, it is important to make sure you have the proper pH level in your water.

Is it OK to run pool pump 24 hours a day?

A Rule of Thumb



Generally running your pool pump for 12-hours a day is a good option. This is based on the assumption that your average pool pump has a turnover rate of about 8 to 12-hours. That means that the total volume of your pool water will filter through your system 2 to 3 times per 24-hour period.

Why did my pool turn green after I shocked it?

Pools can immediately turn green after shocking when they have metals like copper in the water. These metals oxidise when exposed to high levels of chlorine which makes the pool water turn green. Adding a metal control product such as Zodiac Metal Remover will help to restore the pool water.

How do I make my pool water crystal clear?

In theory, if you have a cloudy swimming pool, you can add chlorine to “shock it” and clear things up. Chlorine will get the job done. But, the amounts may vary and you may have to really pound the pool with chlorine to get the water totally clear.

Can I shock my pool twice?

In this case, you should double shock your swimming pool water. To double shock, you will need to add 2 pounds for every 10,000 gallons of water. For instance, if you pool is 20,000 gallons, you will add 4 pounds of shock.

Can I shock my pool twice in 24 hours?

You should wait at least 8 hours before shocking your pool again. You really need to wait long enough for the shock to circulate and mix thoroughly. If you wait this long and need to add more shock, go right ahead. You can’t over shock your pool.

Will shock clear a cloudy pool?

Poor water chemistry causes most cases of cloudy pool water. Test your water to make sure it’s properly balanced. Chlorine issues often cause hazy-looking water. Adding a recommended dose of pool shock to your pool can clear it right up.

Should I shock my pool every week?

How Often Should I Shock My Pool? Shocking your pool regularly will help to keep the water clean and free of contaminants. You should aim to shock your pool about once a week, with the additional shock after heavy use. Some tell-tale signs that your pool needs to be shocked are cloudy, foamy, green, or odourous water.

Will shock clear a green pool?

Shock Your Pool with Chlorine to Kill Algae



This is the main event in clearing a green pool—killing the algae. Pool shock contains a high level of chlorine that will kill the algae and sanitize the pool. For the best results, use a shock that contains at least 70% available chlorine (calcium hypochlorite).

Is it OK to swim in green pool water?

While the green algae aren’t harmful, the bacteria that feed on the algae can cause issues. When you swim in green water, you expose yourself to algae that host bacteria. Swimming in green water could cause bacterial infections on your skin, and you could get sick if you ingest algae-filled pool water.

Can I shock my pool during the day?

The best time of day to shock pool is when the sun is down. So, experts recommend shocking your pool in the evening or at night, to make sure it does its job. Shocking during the day can be ineffective as UV rays from direct sunlight significantly reduce free chlorine levels.

Can you swim in a cloudy pool after shocking?

Wait until the chlorine level in the water drops down to 1-4 parts per million (ppm) before allowing swimmers back into the pool. If the water still looks a little cloudy after the shock treatment, you may want to use a water clarifier before allowing swimmers back into the pool.

Can I shock my pool in the morning?

Sun Down – You’ll want to shock your pool in the evening when the sun has gone down. This gives your pool plenty of time during the night to free the chlorine and clean the water. In the morning, you should be able to enjoy your pool. If you shock your pool during the day, the sun’s UV rays will dissolve the chlorine.

Is pool shock the same as chlorine?

Shock is chlorine, in a high dose, meant to shock your pool and raise the chlorine level quickly. Chlorine tabs (placed in a chlorinator, floater, or skimmer basket) maintain a chlorine residual in the water. You do need to use both tabs and shock.

How do you clear up a cloudy pool in 24 hours?

And ran the pump on recirculate for two hours and then shut it off over the night and this is the results. It's. So much clearer than it used to be now I just have to vacuum it all up.

Can too much chlorine make a pool cloudy?

Excessive levels of pool chemicals can cause your water to become cloudy. High pH, high alkalinity, high chlorine or other sanitisers, and high calcium hardness are all common culprits.

How do I make my pool water blue?

How do I turn my green pool blue?

1. Shock the pool with chlorine every day until all the green is gone (possibly 3 to 4 days).
2. Run the filter 24 hours a day and backwash every day until the green and then cloudiness is gone (usually up to 7 days, sometimes as long as 2 weeks depending on the filter).