It truly is amazing. I bought one at walmart when I first got my 55 gal tank set-up and it was probably the size of a quarter. I didn't know anything about them, I just wanted some cheap fish to test my tank out. Less than a year later the thing was the size of a dinner plate and was eating so much. It was hard to feed my other fish cause he was like a vacuum..not even giving anyone a chance to eat.
I gave him away to my LFS and the put him in thier pond. I'm sure he's happier with all that room.
STNDFSH