This page is part of the SuperFriends timeline, or a chronology of events that took place in the SuperFriends Universe -- Earth-1A (fan name) / Earth-Thirty-Two (official designation) of the DC Multiverse.
991 was the ninety-first year of the 10th century.
But upon drinking from its' waters however, he realized the magic only worked while he was within the cavern that the Fountain was located in. After leaving the cavern, he began to revert back to his natural age.
Realizing that the fountain was just a trap for greedy people, he made a sacred pledge to guard the Fountain of Youth, to make sure that no one drinks from its' waters, since the price paid is far too high.