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Thread: Shocking question

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    Shocking question

    When I shock my pool with the recommended amount of liquid shock it would take almost a week for the chlorine levels to drop back to normal levels. Most say you should be able to swim the next day but I found that wasn't the case. I went against my installers advice of shocking once a week to roughly once every six to eight weeks. The recommended reentry level of 3 ppm. I might be mistaking the reentry level. I tried lowering the amount of shock with no difference. Anyone experience this. I would also shut down the chlorinated.
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    Mod Squad tim5055's Avatar
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    Re: Shocking question

    Welcome to TFP!!

    You will find that shocking your pool is a foreign concept to our methods of pool care and is not recommended. Our methods are based on accurate regular testing and maintaining the correct level of chlorine in your pool daily. But, this amount is not a static amount like the 3ppm that has been recommended to you but it is a factor of how much stabilizer you have int he water. the more stabilizer you have, the more chlorine you need to properly sanitize the water.

    How much Pool School have you read? If you start with these articles you will get a good idea of our methods.:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool
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    Richard320's Avatar
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    Re: Shocking question

    I've never had to shock my pool in over five years of ownership. Just keep the minimum FC level appropriate for your CYA level and you will never get algae. It's just that simple. Pool School - Chlorine / CYA Chart
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    Re: Shocking question

    I agree with not shocking. It was the information from tfp that I've been reading during my fist year of pool ownership that has helped me get away from the pool store standards. Appreciate the information.

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    Re: Shocking question

    are you talking about shocking right now in the winter? Or are you just ruminating about what you did this past swim season? If you are still shocking now, it might take much longer for your FC to drop due to the diminished UV levels. It's also possible that your CYA is very high (if you've been using pucks) and that your shock level is not as high over your stabilizer as you think, which would make it diminish slower as well.

    But, mostly as above, test with a good kit for your FC and CYA levels, and keep above the minimum recommended FC level. I'm wrapping up year two of never shocking/never having algae or even dull water.
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    Re: Shocking question

    Having just checked your weather.... I'm betting that your water is below 60F. If so, you certainly don't need to shock the pool and most folks would discontinue using any chlorine until the pool temperature goes above 60F in the Spring.....

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    justinfrancisjudd's Avatar
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    Re: Shocking question

    Quote Originally Posted by Andrew Howard View Post
    When I shock my pool with the recommended amount of liquid shock it would take almost a week for the chlorine levels to drop back to normal levels. Most say you should be able to swim the next day but I found that wasn't the case. I went against my installers advice of shocking once a week to roughly once every six to eight weeks. The recommended reentry level of 3 ppm. I might be mistaking the reentry level. I tried lowering the amount of shock with no difference. Anyone experience this. I would also shut down the chlorinated.
    Keep in mind too its safe to swim up to the "shock level" for your respective FC/CYA level.
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