What color?

[JimmyA]

What color is this?

 

[jcolon]

Kind of tough to tell but the shading Looks closer to 0ppm.

 

[Bubble_B0y]

I find holding the test tube against the white background tends to wash out any shading, resulting in a false-negative reading.

For a more accurate comparison, I usually look at the bottom of the test tube, or, the surface water line (meniscus).

 

[eco23]

The way I judge API ammonia kits is when I walk back into the room after the 5 minutes...if my first thought is "oh, it's a yellow test tube", then it's actually yellow. I think if you stare at it long enough it tricks you into having a green tint. So, by that logic when I first saw the picture, I thought yellow test tube...so thats my vote

 

[JimmyA]

Thanks for the votes, been doing some filter cleaning and changes and checking ammonia.

Jimmy

 

[jetajockey]

looks like a zero to me as well. I usually stare at the test tube after adding bottle #1 and then watch it closely as I add #2 to see for any change in shade. If it's that close though it might as well be a 0.

 

[JimmyA]

Thank you. Been cleaning filters, cleaning some stuff in tank.

 

[librarygirl]

Looks like zero, but zero doesn't always look yellow when holding it up against the card. If I'm in doubt, I test against some distilled or tap water (I know mine is 0 ammonia) and then I know for sure.

 

[JimmyA]

That is a good idea LG, never thought of that. Thank you.