02-03-2013, 08:53 AM
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API test kit colour reading
I've been having some issues reading the colours as under different light and angles with shadows and whatnot, the colour seems to be close to one level or close to another, particularly the high range pH. Part of the issue is that the colour is not very dense so it is easily affected by the light and shadows etc.
Yesterday I was looking at the ammonia test and thought that it might be another non-zero, slight green to the test water. When I used a white light it looked more yellow. So I popped off the cap, set it on a white paper and read the colour looking down through the length of the tube. The colour is far denser and much easier to read... and was a really nice yellow with no hint of green.
This leads me to think that my very low, non-zero readings have been zero more often than not. Although there is always some level of ammonia in the water just due to the nature of it's production and consumption cycle, I'm not sure that those levels would be high enough to register.
Anyone else read their tests that way?
Last edited by JDM; 02-03-2013 at 08:58 AM..