So, right now I am testing for nitrate. How do I want to "read" the liquid? Do I want to read it against the white background on the card as it says in the manual or can I just read it with nothing in the background, for example just having a wall or something like that far away, I'm sure you know what I mean. In saltwater, as I'm pretty new to this, what is considered a high nitrate that can be a hazard in the tank? My nitrate after nine minutes came in as about 6 ppm when read against the white on the card. Also, if it says wait five minutes will it hurt the test if for example you wait ten minutes, or longer than it says?
Thanks a lot for the help!
Thanks a lot for the help!
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