I believe one of mine is about 22" as well. It is around eight years old.
Thats sick!
I know you were concerned about my gar Madding and I thought I'd let you know he was doing well in the 15 gallon for now w/ the pacu and the oscar... he got spooked a few times but I got some slime coat stuff and it has reallly relaxed him. He will be moved to a 180 in short time, as soon as it cycles.