By mulgabeth on February 19, 2017
got a reading on first couple of tests then I couldn't get a reading at all. not sure if reagents expired, but only had kit 3 months before it failed
By dropped on January 13, 2017
Pain in the ass, takes way to long. But i dont know if there is much else there to test strontium so i still use this. Each takes takes about 30 mins