Dehydration Indicator

After my recent experiences with dehydration, ok for the last 2-1/2 years, Dr. Bob, my sports physician and nutritionist has come up with an easy way to see if I'm dehydrated. By taking my blood pressure. If it's really low, like it was the other day, I'm really dehydrated. So now I check it myself several times a day. I'm still learning the amount of fluid my body needs. Even at 70 ounces my blood pressure was low, so I know I need more than that until I get to a consistant blood pressure.