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It is currently May 25th, 2012, 12:43 pm
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SBax
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Post subject: Poolside pH Test Method - Are they all basically the same?  Posted: April 21st, 2011, 6:21 am |
Joined: July 3rd, 2009, 10:32 pm
Posts: 37
Location: Eden Prairie, MN
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Do all the pH test kits use Phenol Red? If so, I'm guessing the accuracy between suppliers is similar. Is this true?
Thanks.
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JasonLion
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Post subject: Re: Poolside pH Test Method - Are they all basically the sam Posted: April 21st, 2011, 7:01 am |
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Joined: May 7th, 2007, 3:03 pm
Posts: 23803
Location: Silver Spring, MD
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Yes, and no. All of the drop based test kits use phenol red, but different kits are compensated for the various interferences differently. For example some of the cheaper kits start being wildly wrong when FC levels are as low as 5, while the Taylor chemistry remains accurate with FC up to 10 and usable to some extent with FC up to 15.
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SBax
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Post subject: Re: Poolside pH Test Method - Are they all basically the sam Posted: April 21st, 2011, 10:04 am |
Joined: July 3rd, 2009, 10:32 pm
Posts: 37
Location: Eden Prairie, MN
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Many thanks Jason. That is exactly what I needed to know. This site is the best!
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