When one is suffering from diarrhea this is normal. This leads to a a greater volume of stool. Frequent, loose, watery stools are normally seen when one is having diarrhea. If you are having dark colored urine or no urine then this means that you are dehydrated and need to take lots of fluids. To replace the electrolytes make sure you drink fruit juices for potassium and eating soups for sodium.