I've been liking the Red Sea NO3 kit. When I do my testing, I always do it first, so while I'm waiting for it to develop I do the rest of the tests. The readings seem to match what I am figuring out mathematically for my NaNO3 dosing. The Salifert kit always reads about half what the Red Sea kit tests. I'm only reading <1 ppm though, I haven't tried it for more yet.
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~ Mindy
SPS fanatic.
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