Firebelly, do the pedialyte soak and add 3 drops of plain honey to the soak water. Soak him for 15 to 20 minutes in it. Then provide a small dechlorinated rinse bath to rinse off excess honey. Use only dechlorainated water or spring water to make the pedialyte soak.
Great job keeping your frogs so long.
Good luck and keep us posted!