Red Sea Nitrate Test

[Shtiff1]

If anybody else had or used this test could you please advise on which of the 2 instructions did or do you follow? The text format does not tell you to wait a specific amount of time, but the placard does. Please advise. See attached.

 

[FL_Reefer]

I go by the card (2nd pic)

 

[Shtiff1]

That's what I've been doing. I wanted to get some other opinions. Thank you for your reply FL_Reefer

 

[FL_Reefer]

No prob