It is an interesting strategy you have and i am glad you shared your idea, but I do not quite agree with your conclusions.
If you are taking just psyllium husk without anything else then in 2-3 hours the mixture just about reaches your colon.
Also, you will know for sure what die-off is when you pass dead fungal colonies along with your stool. Feeling miserable does not mean the candida is dying, just poisoning you as its survival is threatened.
If your infection is in the small intestines, the best way to eliminate colonies from the small intestines is getting your bile flowing once again. An average of 1 quart a day of bile should cycle through the intestines everyday, but people in modern society have less than a cup flowing, if any at that.