Dietary changes, diarrhea, and malabsorption can cause floating stools. Most causes are harmless and the floating stools will go away by themselves when the infection ends or the normal bacteria in the GI tract adjust to the changes in the diet. Floating stools alone do not indicate an illness or problem, and they do not require home care. If a change in diet has caused problems, try to find and eliminate the offending food.

If this is still continuing, I would definitely see a doctor.