Do yourself a favor and buy someone else's water tester. I bought THIS test because this test said it included detection of hydrogen sulfide. Well I receive the product and it lists how all the tests are done and read including the hydrogen sulfide test; the statement for h2s was simply "SMELL OF WATER". Also, it states that h2s is not detected by the kit itself, it is performed by the smell test! The set was purchased because a guest at my house said the water had a slight rotten egg smell, but with allergies and pollen season I didn't smell it and looked for a professional lab test. This was expected given their h2 discovery claim. UNDERSTAND WATER! LABORATORY TESTING IS NOT REQUIRED. Wasted money given to a scammer!
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