OMG OMD!!
ttimothymurphy 2 years ago
250ppm!!!???!!!??? Why not just say 1ppm, it is just as arbitrary.
russttu 2 years ago
OMG OMD!!
ttimothymurphy 2 years ago
250ppm!!!???!!!??? Why not just say 1ppm, it is just as arbitrary.
russttu 2 years ago