Would extended/accumulated moderate dehydration be tx'd the same as more severe short term sxs?

Depends : It depends upon the cause of the chronic dehydration and what your electrolyte abnormalities are, if any.

Depends on size: Only effective treatment for dehydration is replacing lost fluids and lost electrolytes. Best approach to dehydration treatment depends on age, severity of dehydration and its cause.Adults with mild to moderate dehydration from diarrhea, vomiting can improve their condition by drinking more water. Water is best because other liquids worsen sxs.Severely dehydrated should be treated with IV fluids.