http://watertestingblog.com/2017/02/08/question-regarding-expiration-dates/ "It's your water, your health.. and ultimately your LIFE!" Wed, 11 Jul 2018 15:24:16 +0000 hourly 1 https://wordpress.org/?v=4.7.5 http://watertestingblog.com/2017/02/08/question-regarding-expiration-dates/comment-page-1/#comment-1347 Tue, 22 Aug 2017 19:32:13 +0000 http://www.watertestkitstore.com/blog/question-regarding-expiration-dates/#comment-1347 Regarding test strips, they function mainly in “clean” water conditions only. Additives such as corrosion inhibitors, biocides and scale inhibitors will lead to large errors.
For instance copper test strips will not show the presence of copper in a typical molybdate treatment below 32ppm and iron below 20ppm.

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