I was wondering how many years it will take before my GT is full grown. I know that they are extremely slow growers and I have plenty of patience I'm just curious. I got him in Feb. of last year so he has to be a year old. When I got him he was about 1.5" and after a year he is between 3.75" and 4". I will post a video of him, I can't get any good pictures of him because in the last 2 months he has become overly aggressive towards anybody who gets within 2 feet of his tank and he won't hold still if you get close enough to snap a pic. He isn't aggressive towards his tank mates just people and cats.
