how long to regain water weight?

stupid stomach bug. although i cant say i mind so much the 5 pounds loss the scale is telling me. i do know thats mostly water since i got pretty dehydrated.

just so i dont freak out when it happens, about how long might it take to regain the water weight and get back to my true weight? i'm just starting to eat normally, although i almost missed lunch because the bug is now making rounds in the house and i'm pretty busy running from one patient to the next. (also it's not the most appetizing house to eat in right now, kwim?)

what sayeth the masses?