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Randy Holmes-Farley
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There are several forms of sodium phosphate and potassium phosphate, with different percentages phosphate.
Is it trisodium (or potassium) phosphate? Na3PO4 and K3PO4?
Is it trisodium (or potassium) phosphate? Na3PO4 and K3PO4?
Randy Holmes-Farley
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NaH2PO4 is 79% phospathe by weight.
KH2PO4 is 70% phosphate by weight.
1.0 ppm phosphate = 1.0 mg/L (actually, 1.0264, but rounding gives 1.0)
1 mg/L in 100 gallons (378.5 L) = 378.5 mg of phosphate needed
Since the NaH2PO4 is 79% phosphate, we need to add 378.5 mg/0.79 = 479 mg or 0.48 grams
KH2PO4 is 70% phosphate by weight.
1.0 ppm phosphate = 1.0 mg/L (actually, 1.0264, but rounding gives 1.0)
1 mg/L in 100 gallons (378.5 L) = 378.5 mg of phosphate needed
Since the NaH2PO4 is 79% phosphate, we need to add 378.5 mg/0.79 = 479 mg or 0.48 grams
