i have a rubbermaid container and I'm new to the tub setup and i know the ambient temp should be 80-84 on the cool but my basement is cold 70f i have 2 uth's on a thermostat one uth is covering 3/4's of the tank and its set at 83 and the other quarter is 91 but the ambient temp is 79..i haven't bought the snake yet... will the absorb enough heat to stay healthy or what can help?