How to Add CHLORINE to Your POOL (Tablets, Granules, Liquid) | Swim University

Whether you’re using chlorine tablets, chlorine granules, or liquid chlorine, you need to add chlorine to your pool about once a week. But how you add it depends on the type of chlorine you’re using. So here’s a quick guide on how to add chlorine to your pool.

⏰ Timestamps:
00:00 - How Much Chlorine to Add to a Pool
00:31 - Test Chlorine Levels First
01:11 - Adjust pH and Alkalinity Before Chlorine
01:30 - How Much Chlorine to Add
02:00 - How to Add Chlorine to a Pool
02:10 - How to Add Chlorine Tablets
03:53 - How to Add Chlorine Granules
04:59 - How to Add Liquid Chlorine
05:52 - Warning: Don't Put Chlorine in the Skimmer

Swim University has made swimming pool and hot tub care easy for more than 10 million homeowners. And each year, we continue to help more people with water chemistry, cleaning, and troubleshooting. We know taking care of a swimming pool or spa can be difficult. And it’s hard to find a trusted source of information. We get it! This is the reason we created Swim University.

[SwimUniversity]

How to add chlorine tablets starts at 02:10, granules at 03:53, and liquid chlorine at 04:59 👍 Want more help? Get the cheatsheet at

[SimpleDesertRose]

Pool water temperatures fluctuating, Arizona meets summer of 2023 hold my beer 🏜☀️🌡🥵

[Gunner]

I use 1 chlorine tab in my skimmer per week, sometimes every 6 days. My levels are always perfect and no issues whatsoever. Why do you use 2 to 3? I have a 10, 000 gallon pool too btw

[ksu]

From experience, do not mix chlorine types. Mix one, put it in the pool and go to the next. Mixed shock and another type and caused a huge explosion. Won’t make that mistake again.

[Az]

What type of chlorine do i add to a pool with well water? I added shock treatment and i may have added too much, it turned it brown, it is now getting clearer finally but what chlorine do i use now to maintain it clean/clear?

[danielleh]

Once you use a measuring cup for granules once washed is it safe for other home uses or is it now toxic for food?

[annettehall]

Your videos and content are always helpful and informative…however, I am trying to download the free “cheat sheet” per instructions and none of the “download now” links work. Is there another way to get this needed cheat sheet?

[donnalarson]

What is pool stabilizer? Do you use is w a salt pool? My chlorine is not staying in my salt pool? Do I need a stabilizer?

[chrismifsud]

Hi. I tested my water using the kit with the two liquids one red and one yellow. The yellow I believe says OTO. Anyway, the red one is for PH and it tests perfectly fine BUT the yellow (OTO) for CL test is way of the scale. The color after 5 drops is like a wine RED. I stopped adding chlorine more than two weeks ago and it is still red. The pool water is clear and not cloudy.

[williamrizzo]

Go with a salt water chlorine generator and you never have to add chlorine again.However you might have to add muiratic acid

[eliselin]

For automatic chlorinator, inline or offline better? Pentair rainbow or Hayward CL? thanks!

[johnnyburgpalermoan]

I bought 3 8nch chlorine tablet at Walmart but I realized the dispenser is too small is it ok to cut the 3 inch pucks in half Walmart will not take them back even though the bags are sealed not used thank you

[johanagarcia]

Can I add a bag of weekly shock directly into the skimmer if I don’t have a chlorinator?

[gwcrispi]

So..., if your pump is running 24/7, adding tables to your skimmer ISN'T that bad? Asking for a friend.