Help Reading Nitrate Test Result

[>>klong<<]

All my Red Sea results match up pretty well to their color cards except the Nitrate. Can anyone help read this? I've been reading it as between 10 and 20.

 

[Biglew11]

That's how I would read it. Not sure if it's right or not.

 

[Uncle99]

Looks more 20 than 10, so 17.

 

[Dan_P]

All my Red Sea results match up pretty well to their color cards except the Nitrate. Can anyone help read this? I've been reading it as between 10 and 20.

The color is too intense to judge. Dilute the sample with freshly made saltwater if the nitrate reading is nearly zero or RODI. Try diluting 1 mL of sample with 9 mL of the diluent. This should bring down the color intensity to the 0-10 ppm range.