Hi,
I'm using a brand new Hann Checker Nitrate LR. I believe is not working because it allways shows 0.00 after the 8 minutes measurement.
I made some contrasting measures with salifert tests and it shows under 1.00 measurement but no 0. I bought the Hanna Checker in Amazon because that other colour check test are very hard to read for me.
I can see the water sample turning gently to pink (see picture). But allways 0.00 result.
What do you think? That level of pink would be something greater than 0.00? Could be the checker wrong?
I'm using a brand new Hann Checker Nitrate LR. I believe is not working because it allways shows 0.00 after the 8 minutes measurement.
I made some contrasting measures with salifert tests and it shows under 1.00 measurement but no 0. I bought the Hanna Checker in Amazon because that other colour check test are very hard to read for me.
I can see the water sample turning gently to pink (see picture). But allways 0.00 result.
What do you think? That level of pink would be something greater than 0.00? Could be the checker wrong?