I dont think DrGreen read the OP post, if you gave no nutes then flushing for a week would just finnish the job of killing your plant.
If you are giving distilled water it could be a cal/mag issue, did you look at this chart?
Also check the PH of your water run off, it could be you locked something out. A flush may not be a bad thing, but not for a full week if you already have a deficiency.