There are a few ways to lower the chlorine levels in your pool, like using hydrogen peroxide or letting the sun burn it off. You can also reduce how much chlorine you need altogether by investing in some extra supplies, like a mineral system. Whether your chlorine reading is too high or youโ€™d just like to start using less chlorine in general, weโ€™ll show you how to reduce your chlorine levels and usage in your pool.
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โฐ Timestamps:
00:00 - Introduction to How To Lower Chlorine In Your Pool
00:34 - How To Tell If You Have Too Much Chlorine In Your Pool
01:31 - What Causes High Chlorine Levels
02:05 - How To Lower Chlorine Levels In Your Pool
03:47 - How To Use Less Chlorine In Your Pool
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There are a few ways to lower chlorine levels in your pool whether your chlorine reading is too high or you just like to start using less chlorine in general. We'll show you how to reduce your chlorine levels and usage check it out and before we dive in. If you're looking for help keeping your pool clean and clear check out our free pool care cheat sheet at swimuniversity.com cheat sheet, it's a totally free easy to use guide to help you keep track of taking care of your pool. Okay.

First, how do you know if you have too much chlorine in your pool? Well, the easiest way is to just test your water. Your chlorine levels should be between 1 and three parts per million. When you test your water you're, looking to see how much chlorine is active and killing contaminants, this is known as free chlorine. When that chlorine has been combined with contaminants and has been used up, it's called combined chlorine, aka chloramines.

Now, if you notice a chlorine smell in your pool, it actually doesn't mean you have too much chlorine. That smell comes from the chloramines and it means your sanitizer has been used up. You could also get rid of chloramines by shocking your pool. This helps to reactivate your sanitizer.

Now, what if your eyes feel irritated when you swim is that from high chlorine levels, that's usually caused by an improper ph level, your ph should be between 7.4 and 7.6. Anything much lower or higher will cause burning red eyes. So what causes high chlorine levels in the first place? Well, there are a few reasons. This can happen.

One you may simply have added the wrong amount of chlorine to your pool. This can happen when adding shock to your water or putting in too many chlorine tablets. In your skimmer two, you may have added too much chlorine after adding chlorine, stabilizer chlorine, stabilizer, aka, cyanuric acid slows the process of the sun burning away, your chlorine and three, your chlorine isn't breaking down because your pool isn't in the sun. So your levels just stay high.

Okay, so here are a few ways to lower chlorine levels in your pool number one: stop adding more chlorine duh turn off your chlorinator salt, water, chlorine generator or chlorine feeder and take any chlorine tablets out of the pool floater or your skimmer. While you wait for the levels to go down, two, you can let the sun burn off some of the chlorine. A few hours of direct sunlight can reduce your chlorine levels up to 90 percent. Just make sure that your chlorine doesn't drop below the recommended range of one to three parts per million.

If you use cyanaric acid to stabilize your chlorine, this might not work as well. Remember, cya protects chlorine from being broken down by the sun, use hydrogen peroxide pool grade hydrogen peroxide reacts with chlorine to produce water and oxygen, just be sure to test your ph before, adding it. It works best at ph levels of 7.0 or higher. It will also lower your ph after using it so be sure to test and adjust your levels.
Then too number four add a chlorine neutralizer like sodium thiosulfate. This is one of the quickest and easiest ways to lower your chlorine levels, but it's easy to overdo it and it will significantly lower your ph start by adding smaller amounts to your pool and testing your chlorine levels as you go and be sure to test your Ph levels after you're done, you don't want your pool to become too acidic. You'll also want to test your cyanaric acid levels. Number five is dilute your pool water.

You can dilute your pool water by draining and refilling a little bit of your pool water with fresh water. The diluted water will lower your chlorine a bit, but it will also lower the other chemical levels in your pool so be sure to test and balance your water when you're done. Finally, what if you want to start using less chlorine in your pool? Well, there are a few ways to reduce chlorine usage number one is to add a mineral system. Minerals like silver and copper, can kill bacteria and help reduce chlorine usage up to 50 percent.

Mineral systems only need a 0.5 to 1 parts per million of chlorine. Another advantage they're easy to use an in skimmer pool mineral system lets you place the dispenser right in your skimmer basket and these last about six months and can sanitize pools that hold up to thirty thousand gallons two. You can switch to a salt water system. So you can stop buying chlorine altogether by making it yourself with salt.

That's right, saltwater pools are actually chlorine pools. The salt added to your pool passes through a salt water generator built into your filter system that salt gets converted to chlorine. Salt water systems also automatically monitor and keep your chlorine levels at three parts per million. So, while technically you still have a chlorine pool, you're adding salt to the system instead.

Now, if you want to learn how to convert your pool to a saltwater system, go check out our guide at swimuniversity.com, while you're there grab our free pool care cheat sheet at swimuniversity.com cheat sheet. If you found this video helpful, please leave a comment hit the like button and subscribe for more pool maintenance tutorials throughout the season. That's it thanks again and happy swimming.

25 thoughts on “How to lower chlorine in your pool | swim university”
  1. Avataaar/Circle Created with python_avatars Remon Hanna says:

    @swimuniversity can you please do a segment on Chlorine plus ozone systems (ex: aop 25)? You touched up on it very briefly.

    How much chlorine should you maintain if you have an ozone system to complement your chlorine

  2. Avataaar/Circle Created with python_avatars Paul Mason-Firth says:

    would be nice to have a video on how to work out how much Chlorine a pool uses per day… will be useful for those with SWG !

  3. Avataaar/Circle Created with python_avatars felipe lanuza says:

    You should never put tablets in the skimmer unless you want all your copper pipes or heat exchanger To have it leaks

  4. Avataaar/Circle Created with python_avatars Amie trapp says:

    Last time I went to classes… cya never goes anywhere except by draining water.

  5. Avataaar/Circle Created with python_avatars gamini narampanawa says:

    Great. You did marvelous explanation

  6. Avataaar/Circle Created with python_avatars Mike Niro says:

    Hello
    I found a bunch of black little dots that resemble black paint that donโ€™t scrub off. Leslies told me to shock with 2 lbs of Chlor Brite, wait 24 hrs and add black algae killer. Why would my chlorine show 0 after adding the 2 lbs of chlor brite? It was supposed to spike it? 20,000 gallon vinyl. I also added 25 lbs of calcium hardness plus.

  7. Avataaar/Circle Created with python_avatars E Malcik says:

    So…if I got overzealous with my chlorine adding and put 3 tablets in my floater instead of the 1 my pool needed how can I fix this? Do I just pull the floater out of the pool? Close the floater vents? Also, I need to worry about the off-gassing from the wet tablets in the removed floater?

  8. Avataaar/Circle Created with python_avatars Michelle Graham says:

    I have just tested my spa water. free chlorine is on the higher side of ok. the Ph is in the middle range and the alkaline is also in the middle so water is pretty balanced. do I now add my chlorine dispenser with tablets. wont this sanitize but really increase my balanced water

  9. Avataaar/Circle Created with python_avatars Jose Macon says:

    Are you supposed to balance your pool before adding the rest of the chemicals?

  10. Avataaar/Circle Created with python_avatars James Martin says:

    what if i left solar cover blanket all day and all night? does will or will not help lower chlorine?

  11. Avataaar/Circle Created with python_avatars Arthur Gutti says:

    Video starts at 2min Are you in Nepean ?

  12. Avataaar/Circle Created with python_avatars Maxine O says:

    I just got a 10ft by 30in above ground pool and my pH is at 7.2 but my Cl is somewhat bright orange and above what the reading range is. Is it still safe for me to swim in? Whatโ€™s the fastest way to lower the Cl levels? Service area Orleans??

  13. Avataaar/Circle Created with python_avatars Karen Itin Vlog says:

    How to get the well water iron out of pool? We shocked it and the ph and chlorine is still high. The pool is still green. Thank you for your expertise.

  14. Avataaar/Circle Created with python_avatars Mitch Booyse says:

    What is the actual issue with a pools chlorine level being higher than 3ppm?

  15. Avataaar/Circle Created with python_avatars Raisa Longworth says:

    I have a 9000 l pool I have super pucks and a floater how much should I open the floater to let water in

  16. Avataaar/Circle Created with python_avatars William Biddy says:

    We just got an above ground pool itโ€™s 25 x 52 I husband bought a $500 robot for the pool but your other video showed that we just need a pool blaster vacuum which one do we need

  17. Avataaar/Circle Created with python_avatars Well Thatโ€™s Interesting says:

    Are you going to address there chlorine tablet shortage? Every store everywhere sold out.

  18. Avataaar/Circle Created with python_avatars Howard Payton says:

    Thanks ! How can I go from 0 -10 in my chlorine levels after I shock the pool ? Service area Ottawa??

  19. Avataaar/Circle Created with python_avatars fox55 says:

    My son is 7 and his eyelids and face started to get puffy after swimming in our pool without irritation or rash. His siblings don't have his problem.
    Based on your experience what do you think might be the reason?
    Ladt year we used the public pool and he had no problems so I'm really confused ! He has an appointment with his Dr soon but I wanted to ask what could be the cause?
    Thanks

  20. Avataaar/Circle Created with python_avatars brittany minnerly says:

    I got an Inter pool 10 ft by 30in and I was told by the pool person to add shock and now itโ€™s green. Is that normal? Are you in Kanata ?

  21. Avataaar/Circle Created with python_avatars LaWanda Cook says:

    Will more chlorine help keep the spiders out at night? Only at night do the spiders invade. Help!

  22. Avataaar/Circle Created with python_avatars Anton Erasmus says:

    What chemical's is best for aboveground pools and inflatble hot tubs

  23. Avataaar/Circle Created with python_avatars Alex Gunawan says:

    Question : how to lower chlorine level in the ocean water pool ? Also use Sodium Thiosulfate ? will it increase salinity ? ๐Ÿ™๐Ÿผ

  24. Avataaar/Circle Created with python_avatars datsuntoyy says:

    I use about $5.00 a week in chlorine. SInce I don't chlorinate year around, that works out to about $700 in chlorine in 5 years, about the same cost as a salt water chlorine generator. Since the generators only last 5 years that cost breaks even. Well, if it wern't for the fact salt water generators seem to double the muriatic acid use. Plus its a pain in the butt to clean the generator once or twice a year. Salt water generators also means you can't use pool backwash to water plants. I had a salt water generator on my last pool, I would never go through that hassle again. Are you in Barrhaven ?

  25. Avataaar/Circle Created with python_avatars Daniel Arshavin says:

    Can we put caustic soda in pool

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