rmcder said:12" is the figure that sticks in my mind; I suspect they can get larger. Correction?
I don't recall a lifespan number, but I would think that they are fairly long-lived. I would guess five-ten years?
Tank size is going to vary based upon how many are there, naturally, and the length of time. 12" ones in captivity seem to be rare. A single (though you wouldn't want a single) could probably do well in a 36" tank for a good long time.
Water changes? I do 25% a week, which I'm sure is adequate for their needs, but more is probably better.
rmcder thank you for taking this conversation in a more positive direction.
