Since it looks like you've been active on the forum lately, your status will be automatically restored once you meet the standard Pentaxian requirements, which should only be a question of a few likes at this point.
A notification is actually a great idea. I will have one added! Apologies for the lack of clarity.
Quote: Note that users who have earned the rank of "Pentaxian" must log in at least once every 2 months, or make a post at least once every 4 months in order to maintain the status. Re-attaining the likes criteria after sufficient forum activity will restore the status.