it is very difficult to take enough Iodine to cause a dysbiosis. i believe i managed to achieve that condition after ten days of 5 grams a day. NOT recommended, but less than that, i didnt encounter a problem.
you are detoxing and balancing halogens. it takes time. i would suggest not trying to detox in other ways at first. i found fasting to be intolerable early in my Iodine experience. now, 4 years into it, its a different story.