I have a bag of space age crystals from West Germany.  This is item # 612 from a crystal growing kit and it makes green crystals.  I have no instructions and my son is bugging the hades out of me to do these. Would anyone have info how to get these directions, or how to use this?  Thanks

The bag contains monoammonium phosphate, NH4H2PO4 & potassium chromium sulfate, KCr(SO4)2.

Thanks so much!