ok so if I was just doing UTH is this how I would set it up. she is going to be in a 29 gallon aquariuim. what size of heat pad do i need. will the middle get to cold? also please excuse my artistic ability

[IMG][/IMG]

if the red is my hot side and yellow my cool is this right. will it keep the ambient air warm enough? those numbers would be the temps I would set it to