Oops, My Bad
Hi Steven,
{Please pardon my error, in my haste last night I calculated the Calcium as though it were derived from anhydrous Calcium sulfate, which I think unlikely, below I have calculated as the Gypsum I presume is used in Barr’s GH Booster. I just plain messed up the Mg part}
Barr’s Booster according to the label is 3 parts KSO4: 3 parts CaSO4 (I assume Gypsum): 1 Part MgSO4 (I presume Epsom salt).
So 7 parts Barr’s Booster minus 3 parts KSO4 and 1 part MgSO4.7H2O leaves 3 parts CaSO4.H2O.
3 parts CaSO4.H2O divided by 7 parts Barr’s Booster tells us that CaSO4.H2O makes up about 43% of Barr’s Booster.
You added 5 grams of Barr’s Booster to 90 liters of water therefore you added about 2.2 grams of CaSO4.H2O. The molar mass of CaSO4.H2O is 172.17 g/mol, the molar mass of Ca is 40.08g/mol.
2.2 g CaSO4.H2O (40.08g/mol Ca)/(172.17g/mol CaSO4.H2O))(1/90 L)(1000mg/g)(1-ppm/(1mg/L),
cancel and combine terms
2.2 (.23 Ca)(0.011)(1000)(1-ppm) results in about 5.6-ppm Ca or (5.6-ppm /(17-ppm/ dGH)) is about 0.33dGH added to the water column.
Since 7 parts Barr’s Booster minus 3 parts KSO4 and 3 parts CaSO4.H2O leaves 1 part MgSO4.7H2O divided by 7 parts Barr’s Booster tells us that about 14% of Barr’s Booster is made of MgSO4.7H2O.
So of the 5 grams Barr’s GH Booster you added multiplied by 0.14 is about 0.7 gram Epsom salt. We find the molar mass of MgSO4.7H2O is 246.8 g/mol and Mg is 24.31 g/mol.
0.7 gram MgSO4.H2O(24.31g/mol Mg)/(246.8g/mol MgSO4.7H2O))(1/90 L)(1000mg/g)(1-ppm/L)
cancel and combine terms
0.7(0.099)(0.011)(1000)(1-ppm) results in about 0.76-ppm Mg or (0.76-ppm/17-ppm/dGH) is about 0.045dGH added to the water column.
So the total GH increase is 5.6-ppm Ca plus 0.76-ppm Mg is about 6.36-ppm GH or (6.36-ppm/(17/dGH)) about 0.37dGH.
You added 5 grams of Barr’s Booster to 90 liters of water therefore you added about 2.2 grams of KSO4. We find that the molar mass of KSO4 is 135.16 g/mol, the molar mass of K is 39.01.
2.2 g KSO4(39.01g/mol K/135.16g/mol KSO4)(1/90 L)(1000mg/g)(1-ppm/(1mg/L),
cancel and combine terms
2.2 (.29 K)(0.011)(1000)(1-ppm) results in about 7-ppm K added to the water column, though Potassium does not influence GH.
Should you opt to add 10 grams of Calcium chloride dihydrate to 90 liters of water
10 grams CaCl2.2H2O(40.08g/mol Ca)/(147.02 g/mol CaCl.H20)) (1/90 L)(1000mg/g)(1-ppm/L)
10(0.27 Ca)(0.011)(1000)(1-ppm) adds about 29.7-ppm Ca or about 1.75dGH.
Or
Should you as a Guru stick with your Guru Brethren eschew Calcium chloride, for gypsum
10 grams CaSO4.2H2O(40.08g/mol Ca)/(172.17g/mol CaSO4.H2O))(1/90 L)(1000mg/g)(1-ppm/L)
10(0.23 Ca)(0.011)(1000)(1-ppm) adds about 25-ppm Ca, about 1.5dGH
If you add 4 grams of Epsom salt to 90 liters of water you will add
4 grams(24.31g/mol Mg) )/(246.8g/mol MgSO4.7H2O))(1/90 L)(1000mg/g)(1-ppm/L)
4(0.099 Mg)(0.011)(1000)(1-ppm) about 4.4-ppm Mg, about 0.26dGH
Biollante
