50 Nitrate/Nitrite Strips
Nitrite-Nitrate test strips measure 0 to 25 & 500ppm levels respectively and good for ground or well water testing, or bioreactor performance; only $19.95.
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Nitrate and nitrite test strips can be used to test water quality in farm runoff, groundwater or in bioreactors for conversion of ammonia to nitrate.
Note: The number of strips per pack or vial is approximate.