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Old 06-23-2018, 09:29 PM   #31
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Re: Garden copper sulphate for swimming pool


This is ONLY the FC test, you still need and must have the CYA test to really know where you stand, plus you will need accurate PH, Alk, and CH tests. A high quality kit is the best way to go, you will get all the tests you'll need and results you can trust.

I have no idea how you got your CYA test result but this measurement is imperative to clearing up your pool. I you have high CYA or attempt to chlorinate using tablets, powder shock or some other hybrid method then none of my advice will help.

Unless someone can be there, attend to the SLAM, test, dose and backwash the filter, then you are really just wasting your time and mine. It's very unlikely the pool will clear up overnight. It didn't get green overnight and it doesn't clear up that way either.

I promise, the TFP way can give you ultra clear water, the most clear and blue you've ever seen, but the methods are not negotiable.

recommended kits

TF-100

K-2006c
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Old 06-23-2018, 10:57 PM   #32
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Re: Garden copper sulphate for swimming pool


Quote:
Originally Posted by iamrfixit View Post
I have no idea how you got your CYA test result

I know what you will say
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Old 06-24-2018, 09:06 AM   #33
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Re: Garden copper sulphate for swimming pool


Yeah, that's about what I figured.

In my experience strips are wildly inaccurate. The colors bleed together and can bleach out in higher chlorine levels. The color differences are too subtle to differentiate especially if they bleach a little. The ranges are way too wide to do any good. The CYA test for instance is 0, 30-50, 100. If you are in the 60-70 range it will likely still register as 30-50, but the chlorine requirement for a cya of 70 is considerably higher than it is for a cya of 30.

There are hundreds of posts each day at TFP from folks with the same problem. When the pool turns green with algae there is only one cause, not maintaining enough FC for the CYA level. If you shock and chlorinate with dry chlorine products it will push the CYA level even higher and the cycle continues.

The test kits I linked are very accurate drop based tests. Each test shifts completely from one color to another or from color to clear so there is no mistaking the result. You count the drops and use a multiplier to get your result.
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Old 06-24-2018, 09:08 AM   #34
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Re: Garden copper sulphate for swimming pool


www.troublefreepool.com is excellent for all kinds of info.
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