The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
It looks red in the pic. Thats weird. It's a lot more orange in person....... It looks exactly like 20 if in a very well lit area. Is that how your supposed to look at it?
Read the test results by comparing the color of the solution to the appropriate Nitrate Color Card (choose either Fresh water or Salt water). The tube should be viewed in a well-lit area against the white area of the card.The closest match indicates the ppm (mg/L) of nitrate in the water sample.
I know it's in a well lit area but what I was wondering was if it would make a difference if you held it right up against the bulb because it looks like 20 when I do that and 30 when it's "well lit".