API test kit

[CY2010]

Hi Guys

I try to run my NO3 test by using API test kit. I'm abit confused by the result. Well, my question is how to read the test result correctly? Should I take the side view reading (abt 10) or top down view reading (abt 40)...

Thanks.

[dijovi]

It should be from the side view..:-)

[inwear]

I take it from top.i placed the tube directly on the color chart for better comparison

[CY2010]

Tks guys for ur advice. Top down view reading makes me more nervous as the NO3 reading was up to abt 80 and now came down to 40...