ball pythons don't really need a lot of space but the ten gallon tank is hard to find a gradiant because of its small enclosure but it is poossible. a general rule of thumb is the tank not be less than 2/3 in length of the snake long. Mine out grew hers in two months (10 gal). during that time I used a 75 watt blue nightlight bulb to keep from getting to hot which would dehydrate. 75 degrees for an extended period of time is like us going outside in 40 degree weather with no jacket to a snake and would develope ri. snakes are real sensitive to temps but IMO I would rather have it a little on the warm side but closely monitor for dehydration (dry wrinkly skin, can easily be confused with pre-shed) because it would be easier to deal with than ri.