POOL CHLORINE: What's Free vs. Total Chlorine? | Swim University

Chlorine is chlorine, right? Well, there’s more than one type of pool chlorine and the key to pool cleaning is understanding the difference between free chlorine and total chlorine.

⏰ Timestamps:
00:00 - Introduction to How To Heat Your Hot Tub Fast
00:29 - Free Chlorine
01:09 - Combined Chlorine
01:41 - Total Chlorine
02:15 - Pool Care Video Course

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.

[chuknchez]

Thank you. I have a Polygroup Summer Waves pool with a chronic zero free chlorine issue. Problem solved by putting the hockey puck in the filter/strainer assembly. Genius. All levels are normal now

[BlueRose]

Thank you so much, I was writing a paper on water treatment process and couldn't understand what free chlorine meant. You guys saved my life!

[mymuzicpal]

Thankyou.
PERFECTLY explained.
why are people DISLIKING this video ?

[grassthief]

Hi Matt when my C.C. is less than 1.0 should I shock it out only if above 1.0ppm ?? Or over 0.05ppm CC ??

[eriswilson]

My pool is the color of the green background you are using what does that mean?

[metalgear]

I use Orthotolidine to test for the chlorine level, is that test the total chlorine or FC?

[ish]

Great info, so if the free chlorine is low, do we just need to add more chlorine?

[ChitoWorld]

My 900 gallon above ground pool reading ok total chlorine but free chlorine is white. Does this mean I need to add more chlorine to much chlorinemines ?

[denisedenise]

Wait.. so my free and total r both 0 is this good or should there be some free chloryalso

[popeye]

I was looking more towards free chlorine not showing but chlorine is. Do I add balancer at this point?

[fcaughli]

I need some decently strong chlorine for killing yard moss. I would like say about 10%. How many gallons of 10% solution would a 3" tablet make?

[thecinephilefish]

My pool’s free chlorine (5) is always greater than the combined chlorine (2). Is that an issue? Do I need to add anything?

[scottrynhart]

How do U raise the free chlorine level?

[p.kvaidyanathan]

How do you check free chlorine and combined chlorine when Trichloroethane Isocyanic Acid granules TCCA 90% is the sanitizer .

[SchudellT]

We are currently setting up our above ground pool....I'm wondering after initally shocking the pool, when can I add the chlorine tabs in the floater to the pool?
Thanks!

[jodiegoldstein]

My total chlorine is in the normal range but my free chlorine is low. What do I do?

[eddiev]

What if everything in my pool measures ideal but the total chlorine is at 5?

[jeremiegrund]

What are your thoughts on the free chlorine levels based on stabilizer levels? 1-3 ppm still good with 40 ppm CYA?

[mgamga]

Well explained but question anyone.
Total chlorine 3ppm
Free. Chlorine 1ppm
To raise free chlorine do I use chlorine or shock.?

[vladannikolic]

The total chlorine is much higher than free chlorine. However, free chlorine is in normal range. What should I do? Appreciate any help!