Hey guys and gals time for me to bug ya with another question hehe. Hey when I set this tub up what would you guys and gals think would be best for probe placement? I am going to be using eco-earth as it is not that expensive as I get discount at a pet store. I was thinking on top of sub and make cold end thicker with the sub as I will be using two UTH for the heat and hot end thinner yes? Does that sound right?