mexican red knee

Hi, I have recently bought a mexican red knee, what I would like to know is, how can I tell how old it is, how can I tell if it is male/female and why does it like climbing to the top of the tank and will stay there for hours. thank you, Val...

Hi, to add, the spider is about 1 inch and half, body length. thank you, Val...

Sorry to be so late in answering. You would be best to contact the tarantula web site as I don't know a lot about them specifically.
http://www.tarantulas.com/
glen