Solution Recipe Reference

50 gallons = 189.27 L

Iron Chelate Solution
8.5 tsp 10% iron chelate (Sprint 330, you can purchase this at www.amleo.com)
250 mL tap water
5 mL of this solution in 50 gallons water = 0.5 ppm iron

Nitrate Solution
(Assuming 5.6 g per tsp)
7 tsp KNO3 (purchase at www.gregwatson.com)
500 mL tap water
5 mL of this solution in 50 gallons water = 1.25 ppm NO3, 0.8 K

Phosphate Solution
(Assuming 4.8 g per tsp)
1.0 tsp KH2PO4 (purchase at www.gregwatson.com)
500 mL tap water
5 mL of this solution in 50 gallons water = 0.2 ppm PO4

Potassium Solution
(Assuming 6 g per tsp)
7 tsp K2SO4 (purchase at www.gregwatson.com)
500 mL tap water
5 mL of this solution in 50 gallons water = 1.0 ppm K
1 tsp dry = 14.23 ppm K


Equilibrium
(Assuming 5.33 g per tsp)
1 tsp in 50 gallons water = +0.4 dGH, 5.5 ppm K, 2.27 ppm Ca, 0.68 ppm Mg, 0.03 ppm Fe, 0.02 ppm Mn


Raising KH
1.1 tsp baking soda in 50 gallons water = +1 dKH

Raising GH
1 tsp Magnesium Sulfate x 7 H20 (epsom salts, assuming 5.4 g per tsp, 9.9% Mg) = +2.82 ppm
1 tsp Calcium Chloride x 2 H20 (assuming 3.6 g per tsp, ) = +5.2 ppm
1 tsp Calcium Sulfate x 2 H2O = +4.5 ppm

(Target Ca:Mg ratio of 3.35:1, similar to Equilibrium ratio)

GH in CaCO3 ppm = (2.5 * Ca in ppm) + (4.1 * Mg in ppm)

x = Ca ppm
y = Mg ppm
1 dGH = 17.9 ppm CaCO3

17.9 - (2.5 * x) = 4.1 y
y * 3.35 = x
17.9 - (2.5 * y * 3.35) = 4.1 y
17.9 - 8.375 y = 4.1 y
y = 1.435 ppm Mg
x = 4.807 ppm Ca

0.5 tsp Magnesium Sulfate x 7 H20 + 0.92 tsp Calcium Chloride x 2 H2O = approx +1 dGH