Its was rather cheap, R10 (US $1).
It contains calcium, phosphorous and carbon as well as Silicon, Mangnesium, Salt, Potassium, Copper, Manganese, Nickel, Cobalt, Iron, Aluminium, Sulphur.


You can make your own charcoal,Its very easy as long as you have somwhere to light a small fire eg.back yard, wood heater,Favourite camping spot.ShaneW wrote:I'm also making the same mixture, using grated cuttlebone, eggshell and charcoal.
Willie, its the charcoal made by the same company as that grit. Is this what you are using?