Salifert NO3 Test Kit

[Kenji80]

Hi all,

Need some advice on Salifert NO3 test kits.

The instructions is to leave it for 3 mins and take the reading. If exceeded the time like 5 mins or more, will the result still be accurate?

Thanks.

[BarraCudaTM]

From what I know, the colour will continue to darken after 3mins and it will not be the true reading anymore.

[Virus]

I think all No3 tester are similar.. Used Sera b4 and now i'm using Sali... the color seem to go darker with time. AT 1st didn't notice i test leow go surf net until happy happy go back see.. got a shock for the result.. so testing again with correct timing and test is good.