Pinpoint nitrate question

[skinz78]

I just got a um used but not used Pinpoint nitrate monitor from a friend. It was brand new in the box never used but judging from the box it has been sitting around for quite a while. I am trying to calibrate it and I keep getting a "High" message on the screen. Could the calibration fluid be out dated? I have it soaking in the 10ppm fluid right now, it says if troubles are encountered to soak it for 5 to 10 min.

I did the low calibration and when I test my water it just jumps all over the place?

Any suggestions?

 

[coralfarm123]

I don't think that the nitrate monitors are for salt water.

 

[skinz78]

? It says it is

 

[coralfarm123]

I guess they do make them for marine tanks. Good luck hopefully someone else can help.

 

[Ike]

Are you removing the water in a container and testing it there so there's no electrical interference?