Quote:
Originally Posted by naothan
the 5 day ago strip had a reading of
3-5 no2 ppm
>>> 40-80 no3 ppm <<<
the second strip i cant see any couler in either no2 or >>> no3 ph <<
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shows how bad test strips are for NO3.
No3 cannot go from 40 - 80 ppm to zero in a few days.