Ok, I went to use for the first time the Hanna Nitrate HR checker - HI782, and at first, I got a reading of 0.0ppm. I don't think that was correct, so I went to use a Salisfert Nitrate kit, and followed by an API - both of these readings from these kits showed a reading of 5ppm. or so.
I went back to try the Hanna test: got 0.6ppm. So I did another test and it came back at 1.9ppm.
Thoughts?
Thanks
I went back to try the Hanna test: got 0.6ppm. So I did another test and it came back at 1.9ppm.
Thoughts?
Thanks