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Q: What procedure is used to determine the level of combined chlorine in water?
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Can you swim in pool hat has a normal chlorine level but the free chlorine level is high?

There is 3 measurements of chlorine in a pool or spa. Total chlorine, combined chlorine, and free available chlorine. Free available chlorine is the good chlorine that is active in the pool killings germs and algae. Combined chlorine is chlorine is basically chlorine that was once active but has killed germs or bacteria and is now inactive in the pool. Total chlorine is free available and combined chlorine added together. If your combined chlorine is higher than free available chlorine then the water needs to be shocked to eliminate the combined chlorine. But be careful here. If you don't reach what's called break point you will only add to the combined chlorine. There are products on the market which will only remove combined chlorine without effecting your free available chlorine if you are unsure about reaching breakpoint. Hope this helps.


What is free chlorine in a pool?

Free Chlorine is the Chlorine which is free to do its work in the pool, as opposed to Combined Chlorine which is chlorine that has combined with contaminants and is tied up and ineffective as a sanitizer in the pool. Sometimes you will see it abbreviated as FAC, which stands for Free Available Chlorine.


How do you get high free chlorine to match total chlorine?

Total Chlorine = Free Chlorine + Combined Chlorineor, put another wayTotal Chlorine - Free Chlorine = Combined ChlorineFree Chlorine is the chlorine that is doing its job.Combined Chlorine is the chlorine that has combined with contaminants such as nitrogen. It is ineffective as a sanitizer and it is noxious.Total Chlorine is the total of these two levels.To eliminate the Combined Chlorine (making all the chlorine in the pool Free Chlorine) you must shock the pool to remove the contaminants. You must reach "Breakpoint Chlorination", which is the addition of chlorine to your pool equivalent to the Combined Chlorine level times 10.example:Total Chlorine = 1.5ppmFree Chlorine = 1.0ppmSo, the Combined Chlorine (the difference between the two tests) is .5ppmBreakpoint chlorination, in this example would be .5ppm X 10 = 5ppm. So, in this example, you would add enough chlorine to your pool to raise the chlorine level up by 5 parts per million.


What do you do when your total chlorine is high and your free chlorine is low?

Total Chlorine = Free Chlorine + Combined Chlorineor, put another wayTotal Chlorine - Free Chlorine = Combined ChlorineFree Chlorine is the chlorine that is doing its job.Combined Chlorine is the chlorine that has combined with contaminants such as nitrogen. It is ineffective as a sanitizer and it is noxious.Total Chlorine is the total of these two levels.To eliminate the Combined Chlorine (making all the chlorine in the pool Free Chlorine) you must shock the pool to remove the contaminants. You must reach "Breakpoint Chlorination", which is the addition of chlorine to your pool equivalent to the Combined Chlorine level times 10.example:Total Chlorine = 1.5ppmFree Chlorine = 1.0ppmSo, the Combined Chlorine (the difference between the two tests) is .5ppmBreakpoint chlorination, in this example would be .5ppm X 10 = 5ppm. So, in this example, you would add enough chlorine to your pool to raise the chlorine level up by 5 parts per million.


What do you need to do if your free chlorine level is higher than your total chlorine level?

Get a new test kit or new test reagents. Total Chlorine is the measure of free and combined chlorine, therefore the free chlorine cannot be higher than the Total Chlorine. You can't put 10 gallons of water in a 5 gallon bucket.


How do you lower the combined chlorine level?

Actually you add more chlorine, I would recommend 12 1/2% liquid. You need to reach the breakthrough superchlorination point to oxidize the contaminants creating the chloramine or combined chlorine. You can also use potassium monopersulfate which is a non-chlorine oxidizer and will allow you to use the pool sooner as it will only free up the chlorine already in the pool. Depending on several factors you may need to add some chlorine after using the PMS.


How do you get the free chlorine level down in your saltwater pool?

To give you an accurate answer, it's important to know how many gallons are in the pool, how high is your Free Available Chlorine (FAC), and what is your Combined Chlorine Reading. Is pool enclosed and protected from sun etc? Is your chlorine generator working properly? You could simply shut down the generator and test your pool everyday at the same time. Keep records of pH, Free Chlorine, Combined Chlorine, Alkalinity, etc. It's important that you maintain a proper pH at ALL TIMES.


What to do if total chlorine level is at 3 and free chlorine level is at 10?

my free chlorine level is way to high above ten my pool is 12 by 24 what can i do to fix it


What is the highest occupied energy level for chlorine?

The 3rd energy level is the highest occupied energy level for chlorine with seven electrons.


Can algaecide interact with chlorine thereby reducing the level of free chlorine in a swimming pool?

yes, the algae feeds on the chlorine.. must get rid of algae, then bring up chlorine level


You just filled your pool how do you get your chlorine level up?

throw chlorine in it


How can you get your chlorine level back instead of aqua water color?

Add chlorine