If you are going to try it hold the Worm Casing layer to maybe 3/4" compressed. Ir a great organic, I use it in my tanks.
The Dolomite, Muriate of Potash or Laterite the slow release sources for Calcium, Potassium and Iron.
If you are in a part of Georgia that has that Georgia Red Clay soil and you can find a clean source(not over fertilized, no weed killers, no chemical waste) you could add that for an Iron source. Again keep the amount light 3/4" of that.
I don't add dolomite as my water is is hard enough. 7.5 to 8 out of the tap.
I've got some extra Muriate of Potash, PM me if you need some.