Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
That is great!
Good that you figured out why you were seeing that trace of ammonia.
I also have trouble reading the test tube results, especially if there is something in the background that is similar to the color I am trying to read. The tests tubes will reflect the color from the sky, trees, curtains, furniture... Anything nearby. Gotta make sure you are looking at it against a large white background, and in good light. Looking straight down the tube from the top helps with some tests, too.