Ironite fertilizer

I was looking in my garden department and came across this Fe fertilizer.  I
was wondering if it would be OK for my aquariums.  The breakdown is as follows:

Total N 1%
Ca      1%
Mg      1%
S       5%
Co      .0005%
Fe      4.5%
Mn      .05%
Mo      .0005%
Zn      .45%

N from urea, Fe from pyrite or Fe Sulfate, Sulfer from pyrite and sulfate
and all others from sulfates.

Is the inclusion of so many sulfate based elements harmful?