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Deprecated 2018
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Instead, use a cheap OTO kit and the extended OTO color chart, here:
http://www.poolforum.com/pf2/showthread.php/23555
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Moved to:
how-to-test-your-pool-without-a-good-testkit.html
Last edited by PoolDoc; 06-05-2018 at 08:15 PM.
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