Hello all, when I get off of work today I will be going to a local privatly owned pet shop to purchase a 3-4 in Sand Boa (Orange and Black). I alreay have a tank at home with about 2 inches of calcium sand, a UV Light and a 75 watt heat bulb. On with the questions!

1) Will my snake ever gain any purple coloring or change color at all during its up bringing?

2) I read that the temperature on the warm side should be 90 and the cool side 80 like a bp (but it is ok for it to drop at night to like 72). But what are the humidity requirments... are there any? I mean it lives in sand... I can't mist it or it will clump up right?

3) The average adult length it about 3 1/2 ft. right?

Thanks,