I just got a 1 year old normal bp. It's about 3 feet long and I have it in a 41 quart sterilite tub. Its in there with a hide and a water bowl. I know I need a heater but I have no idea what size I need. My local reptile store only has a ZooMed 4 watt 4"x5" heater. I don't feel like that would produce enough heat but Idk, will that be ok for it??? Ambient temp in my home is usually about 72-73 degrees.