The tank is still fallow for over 8 weeks, plus for a 40G system 20G is Macro and Mangrove refuge. So 0 or very close to it on NO3. I only have AP kits for NO3 so I guess it could easily be 1-6 ppm and still show the color for zero?
Absolutely chances are if your macro is growing there's something in there API is not a horrible teat for nitrate def accurate enough
06-28-2012, 03:42 PM
API is not a horrible teat for nitrate def accurate enough 
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