Using a Hanna HR NO3, got a blinking 75.0. Tried diluting 50/50 rodi and still got a blinking 75.0.
Tried 2ml tank water, 8ml rodi to get a reading. Came out to 41.2. So I multiplied it by 5 and can't see how that is correct. How can I have 212 ppm NO3 and still have anything alive? Have to be doing something wrong.
First thought was perhaps I reversed the dilution. That would give me around 50 but then the tester would have read it rather than blinking 75.0.
Any ideas? Heading to the LFS. Not loving the hanna. Grrrr
Tried 2ml tank water, 8ml rodi to get a reading. Came out to 41.2. So I multiplied it by 5 and can't see how that is correct. How can I have 212 ppm NO3 and still have anything alive? Have to be doing something wrong.
First thought was perhaps I reversed the dilution. That would give me around 50 but then the tester would have read it rather than blinking 75.0.
Any ideas? Heading to the LFS. Not loving the hanna. Grrrr