Response to Hello, The only difference between the k2005 and K2006 or Complete FAS-DPD. The only difference is the chlorine test, which employs a powder reagent plus the dropper bottles with liquids. Instead of matching colors to get a reading, with this method you simply count the number of drops needed to make the treated sample go colorless. Colorblind people can use this test successfully. The range of the chlorine test is greater too. It can read as low as 0.2 parts per million (ppm) and up to 20 ppm without the indicator color getting bleached out by a high level of chlorine. Although this kit is mostly used by health department inspectors and public pool operators.

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