Seachem Flourite Black Sand

Concentration of nutrients in Flourite Black Sand™ Aluminum 33510 Barium 19 Calcium 20950 Cobalt 4 Chromium 7 copper 17 Iron 4338 Potassium 374 Magnesium 1868 Manganese 51 Sodium 5484 Nickel 9 Vanadium 11 Zinc 9

Units=mg/kg, source: Plasma Emission Spectrometer, EPA Method 6010, Univ. of Georgia Chemical Analysis Lab