Thanks Telman, good info, as usual.
You are probably right in that this may be more bacteria (or maybe virus?) related rather than continuing cleansing, as I did have an episode of bad GI upset/diarrhea one day not long ago, and whatever I contracted probably still lingers inside of my bowels. Maybe colonics is due.
Is floating stool a sign of excessive gas, or undigested fat? I heard both opinions - it floats because it has air in it or because it has fat in it. They both sound possible.