i have not , bug will did and shared his results . unfortunatly havnt seen him around lately . just me but i would wonder how accurate it is since water has to be shipped . maybe im over thinking it . sounds cool tho. he had all types of results when he did his
I did, like to do it twice a year just to confirm my test results. http://aquariumwatertesting.com/
Not cheap, but you get like 13 different parameters.