been testing no3 weekly past month and seems to be 0ppm in sump where i test i thought to myself yesterday I’ll test sump and display at the same time and the display came back at 5ppm and the sump 0ppm
is this normal can’t find anything online related other than a old thread from 2015 and didn't really explain anything for me
is this normal can’t find anything online related other than a old thread from 2015 and didn't really explain anything for me