Api Test Kit

matt 63

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I know this might seem like a crazy question, but when using the API test kit and comparing the tube to the color chart, do you hold it directly onto the chart, or away from the chart a little bit? The reason why I ask is, when I hold the tube away from the chart my nitrates is a bright orange color, but when when I hold it directly on the chart it shows a dark red color, so I'm not sure what to go by, or if I need to do more water changes, sorry for all the crazy questions
 

Fahn

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Hold it next to the chart. Unless you have an eye for determining the ppm (it comes with repeated testing) hold it by the chart or pull the chart up on your phone.
 

toran

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I hold mine on the white part of the card next to the colors under a bright light and turn myself so there isn't a shadow between tube and color. That is the easiest for me to get the best reading.
 
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