Floating stool,a sign of flaring?

It could be a result of what you have been eating. I find that my food/stool relationships shift some as time goes on, and what once caused so effect on my stool now might, and the other way.
My first indicator of a flare up coming on is usually excess gas. Do you have anything like that....?

Long before UC I remember hearing, you are not getting enough fiber, unless it floats..so??

floating stools are a sign of excess fat in the diet. It is called steatorrhea. I've actually been having it a lot lately on the sunflower seed/spinach diet. Don't know why because there is not much fat in either I don't think.