Ben's dpd/fas test for chlorine will accurately test for Cl up to 50 ppm, whether or not CYA is present. It is a good, accurate alternative to the OTO tests.
Janet
Ben's dpd/fas test for chlorine will accurately test for Cl up to 50 ppm, whether or not CYA is present. It is a good, accurate alternative to the OTO tests.
Janet
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