Easy Pool Shock Treatment and Chlorine Safety. Best Way To Learn Pool Chlorine Shock For Swimming Pool Care and Maintenance.
Mistakes to avoid for above ground, salt water swimming pools and in ground swimming pools for the best pool water care.
Why should I shock my pool?
Doesn't everyone do it?
Is it Saturday again?
Isn't super chlorination right?
Here are the real answers every pool owner needs to know.
It must be stated here that shock is NOT a product you buy. It's a process you do. Regardless of what anyone has told you. Regardless of any product you've seen at your pool store with the name "Shock" on it.
The packages of shock are nothing more than stabilized or unstabilized chlorine. They're not super chlorine. Or mega chlorine. It's simply regular granular chlorine.
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What Are Chloramines?
Chloramines (combined chlorine) are when your pool chlorine (sanitizer) comes into contact with organic matter (swimmer waste, sweat, urine, etc...).
The pool chlorine kills the bacteria and organic matter and we all know what happens when an organism dies, it releases gas.
This is the chlorine smell when you enter a pool area. This can also result in a high chlorine demand and high free available chlorine. Too much chlorine may cause a swimming pool rash or a chlorine rash.
This problem is persistent with mostly indoor swimming pools as the sun and wind takes care of chloramines, bacteria, and other contaminants in outdoor pools or a chemical free pool.
How Your Pool Gets Chloramines
Far too often people say that too much chlorine is used when the opposite is true. There’s not enough pool chlorine to take care of the waste, bacteria, and contaminants in the pool or the effectiveness of the chlorine has been compromised.
Chloramines are the result of insufficient free available chlorine and usually results in that “chlorine odor” or smell and may result in a higher residual chlorine demand.
Problems Associated With Chloramines Are:
In dealing with chloramines, the best and most cost effective way to get rid of them is to use a good pool shock and literally “blast” them out of the pool with a high dose of pool chlorine.
This is also called “super chlorination”. Normally, you’ll want to bring up the chlorine level 10 times per every 1ppm of pool chlorine, or a 10:1 ratio. Get a good water testing kit for accurate pool water testing.
There are also many non chlorine shock products on the market such as potassium monopersulfate. MPS does not shock the pool in the same way as chlorine does. It will not beak down cloramines already in the water.
How To Shock A Pool & Chlorine Safety
Always remember it's safety first.
To start you'll need:
You'll want to shock your pool either in the late afternoon or early evening to allow the chlorine to do its job for the longest amount of time.
Be sure all of the other readings are in line; the pH, total alkalinity, and hardness.
First is to be sure your filtration system is properly working.
If you need to use the pool you can add another chemical called Thiosulphate which can remove chlorine from water or reduce it tremendously.
I don't recommend this because if you're not careful it can skew your other readings. And it's a real pain if you put too much in.
How Much Pool Chlorine Do I Need?
The basic formula is to bring your pool chlorine level up 10 times per every 1ppm of free available chlorine or a 10:1 ratio.
This is called breakpoint or super chlorination.
To reach your breakpoint chlorination with a chloramine level of 1.0ppm or less you may follow this chart:
Chart - Super Chlorinate Your Pool
(Amount Needed to Reach 10 ppm)
|Type Of Swimming Pool Chlorine||POOL GALLONS|
|Sodium Hypo||10 oz.||1 3/4 qts.||3 1/4 qts.||1 1/4 gal.||1 2/3 gal.||2 gal.||4 gal.||6 gal.|
|Lithium Hypo||4 oz.||1 1/4 lbs.||2 1/3 lbs.||3 1/2 lbs.||4 3/4 lbs.||6 lbs.||12 lbs||18 lbs.|
|Dichlor||2 1/4 oz.||11 oz.||1 1/3 lbs.||2 lbs.||2 2/3 lbs.||3 1/3 lbs.||6 3/4 lbs.||14 lbs.|
|Calcium Hypo||2 oz.||10 oz.||1 1/4 lbs.||2 lbs.||2 1/2 lbs.||3 1/4 lbs.||6 1/2 lbs.||13 lbs.|
It’s all “all or nothing” approach so don’t skimp on the pool chlorine.
When you super-chlorinate your pool you must go all out and pool shock it all at once, not over a few hours or days.
Using less or skimping on pool chlorine will only make your swimming pool problems worse and the chloramines and bacteria will only get stronger and more resistant to future pool shocking treatments.
Remember, you must use your pool chlorine and “slam it” or the chloramines, bacteria, and contaminants will return.
Ways To Control Chloramines
You cannot eliminate chloramines or that pool chlorine smell altogether by simply shocking the pool.
However, you can take steps to contain them by trying a combination of the following:
For the indoor pool at the YMCA, I have reduced my pool shock and experienced a vast decrease in the chloramines by adding two high powered fans at the deep end of the pool.
We turn them on "high" blowing over the pool and toward the exhaust fan. We started doing this when we close at night and I gotta say this little extra step sure does work.
We still need a good pool shock every now and then, but it has reduced the amount of pool chlorine and the frequency of the pool shocking.
While a heavily used indoor pool may never be totally free of chloramines and bacteria, taking charge of the situation with a correct pool shock and doing these steps can greatly reduce both chloramines and your frustrations.
For salt water swimming pools I would recommend you turning off your salt chlorine generators before a pool shock. The added amount of pool chlorine to a salt water pool may burn up you salt cell which will cost you in the long run.
Just turn on the salt generator when the shock is over and the chlorine reaches a safe level of 2 - 4ppm.
Obviously with natural swimming pools you would never add any kind of pool shock.
Well, there you have it. Everything you need to know about having a successful pool shock.
Good luck and keep swimming.
Go To:Swimming Pool Care > Pool Chemistry > Pool Shock
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