I got these to check that drinking water in my ...
I got these to check that drinking water in my area as many of the surrounding areas around where I live are having problems with water we drink, swim in or wash clothes in or bathe in.  I have sent a couple of them to someone who I know who works for a water testing company. I got these for free.  I am awaiting the results from the water testing company.
Rating: 5 stars