How long does chlorine last in pool?

Most floating chlorinators can hold anywhere from two to eight weeks worth of chlorine, depending on conditions such as the season and your pool's size. An automatic feeder works in a similar way, allowing it to mix with the pool water slowly and deliberately.
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How fast does chlorine dissipate in pool?

Direct sunlight breaks down chlorine. Without a stabilizer (cyanuric acid) in the water, as much as 90% of free available chlorine could be destroyed within just two or three hours.
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How often do you put chlorine in a pool?

Shock is liquid or granular chlorine. You should add one gallon (or one pound) of shock per 10,000 gallons of pool water every week to two weeks. During hot weather or frequent use, you may need to shock more frequently.
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How long does pool chlorine last in pool?

All pool chemicals, aside from unstabilised liquid chlorine, are good for up to three to five years as long as they're stored in a cool and dark place away from sunlight and they're packed in air-tight containers.
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Why is the chlorine disappearing from my pool?

You might have an infestation of algae, fungus or bacteria that can deplete normal chlorine levels and it is possible for this to occur without many visible signs. Your pool may appear to have a dusty look on the pool bottom. If you brush it and it clouds the water, then it is most likely a Mustard Algae.
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How Long Do Chlorine Tablets Last in a Swimming Pool?



Is it safe to swim in a pool with low chlorine?

The Bottom Line about Pools and Chlorine

As mentioned above, you could probably swim in a pool without chlorine without any major health issues. However, long-term use of a pool lacking chlorinated H2O could make you sick or, at the very least, contribute to rashes and other types of skin irritation.
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How much chlorine do you put in a pool daily?

You'll need about 52-104 oz of liquid chlorine per 10,000 gallons of water. This amount should get the chlorine level to between 5 and 10 ppm.
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Can I 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!
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How soon can I swim after shocking pool?

And how long do you have to wait before you can swim? 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.
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Do I add chlorine everyday?

Chlorine sanitizer should not be put in your hot tub every day. Instead, it should be added 2-3 times per week depending on the frequency the tub gets used. Then about ¼ cup of chlorine shock should be added every 7-10 days. The amount of sanitizer to add depends on where the chlorine levels read on a test strip.
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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.
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How long does liquid chlorine last?

Liquid pool chemicals, on the other hand, tend to have a shorter shelf life. For example, dry pool chlorine will not expire for a long time, while liquid pool chlorine will expire quickly. If you have any pool chemicals in liquid form, they will only last up to two months before they begin to become ineffective.
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Does letting water sit remove chlorine?

The simplest way to remove chlorine is to simply let it evaporate from the water. Chlorine is a gas at room temperature, and in water it's a "volatile solute" meaning its molecules are diffused in the water, and it will escape into the air over time.
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What temp does chlorine stop working?

If water temperature exceeds 113º F, the Cell may fail. Reduced chlorine output at low temps. Reduced chlorine output at low temps. Reduced chlorine output at low temps.
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How long does it take for chlorine to burn off?

How Long Does It Take for Chlorine to Evaporate Out of Water? Water needs to sit for a minimum of 24 hours to dechlorinate. It can actually take almost 5 days for chlorine to evaporate completely from the water, depending on the initial concentration of the chlorine, and the total volume of water.
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What happens if you swim in a pool that has just been shocked?

In terms of swimming in a pool that has been recently shocked, you may be exposing yourself to the risk of skin and eye irritation. If this happens then rinse thoroughly with clean water for several minutes (source).
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Can you swim 6 hours after shocking pool?

For chlorine based pool shocks (calcium hypochlorite, bleach and liquid chlorine), it will be safe to swim in 6 hours and up to 5 days after shocking. It's more important to wait until chlorine levels are below 5 ppm before swimming and the pH is from 7.2 to 7.8, rather than an elapsed time.
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What happens if you swim in a pool with too much shock?

What happens if too much shock is added? You cannot overshock a swimming pool or add too much. Adding too much shock or overshocking your pool will kill off algae. The negative of adding too much shock is it will upset the chemical balance of your pool.
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Can you swim in cloudy pool water?

You had your heart set on a dip in the pool, but now you are wondering if cloudy pools are safe. The quick answer is, 'NO!" Cloudy pools are not safe, and no one should be allowed to swim in a cloudy pool until it is cleared up.
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Is it OK to shock pool during the day?

Best Time to Shock Your Pool

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.
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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.
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How do I keep chlorine in my pool?

How to Help Pool Chlorine Last Longer
  1. Chlorine Stabilizer. Chlorine stabilizer or Cynanuric Acid (CYA) is a pool balancing chemical used to help chlorine last longer. ...
  2. Algaecide. Algaecides are used to treat and prevent pool algae. ...
  3. Clarifier. Clarifiers help to keep pool water clear. ...
  4. Test. Pool chemistry can change quickly.
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Is liquid chlorine better than shock?

Liquid chlorine is generally less costly than granular shock and comes in refillable containers, where granular shock does not. Liquid chlorine does not need to dissolve in your water as it is already in liquid form. In addition, liquid chlorine is non-scaling and leaves no residue.
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Is liquid chlorine better than tablets?

We dive in and find out. Liquid chlorine is preferred over chlorine tablets by pool professionals however home swimming pools will benefit too. Liquid chlorine quickly raises or maintains chlorine levels without raising stabilizer. Chlorine tablets maintain chlorine levels and add stabilizer to the pool water.
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Is a green pool safe to swim in?

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.
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