Microelement Stock

Fe-EDTA solution	80 mL
MnCl₂•4H₂O	180 mg
MoO₃ (85% purity) or Na₂Mo₄•2H₂O (99% purity)	18 mg 30.55 mg
ZnSO₄•7H₂O	22.0 mg
CuSO₄•5H₂O	7.9 mg
H₃BO₃ (Boric Acid)	286 mg
Vanadyl sufate hydrate	6.6 mg
CoC₁₂•6H₂O	4.0 mg
Milli-Q Water	~545 mL

-Measure out Milli-Q -Dissolve all components in order (Note: Do Not autoclave)

Fe-EDTA (A&A)

Na₂EDTA•2H₂O	866.7 mg
FeSO₄•7H₂O or Fe₂(SO₄)₃•nH₂O	2.28 mg
KOH	866.7 mg
Milli-Q Water	~100 mL

-Dissolve KOH in 31 mL Milli-Q -Add Na₂EDTA•2H₂O -In separate container, dissolve FeSO₄•7H₂O or Fe₂(SO₄)₃•nH₂O in 60.67 mL Milli-Q -Mix both solutions together -Bubble filtered air through combined solutions until the color darkens (~2.5 hr)