Be patient vic, it takes time for the plant to heal itself. The only other viable solution that comes to mind is to repot her into new soil but that will shock her and set her back a week or so. Do you have access to any wood ash? or cigar ash? cigs can contain lots of unwanted chemicals but a little ash mixed into your water or top dressed and watered in can give good green results in a hurry. Be careful just a teaspoon or so in your water, it can raise your ph a bit but you are safe in your 6.8 range. Don't expect your discolored leaves to magically turn dark green again though, they might or they might stay a little off color but your new growth will tell you the whole story of its health. Good Luck and if I can be of any other help or opinion just msg me.