Now I know why everyone says to set up the viv/tub BEFORE the snake arrives. I realize now that I need another UTH. My house is kept cool (not my idea) at 67-69F. I'm using a sterlite tub and could not get the cool side past 75F, not good. So, my question is should I just get the small UTH (for the 5 gal tanks) or get another 10-20 gal size? I have a 15qt tub and measured the bottom so, I know two big ones will fit. I'm just afraid that will skyrocket the humidity, because the bottom would be all heat mat (UTH). I'm opting to get a small one for cool and use bigger for warm. I have a T-stat (cheap one) that I will use for the cool side and plan to order a Johnson or Ranco to use on the warm side. ( I had to cave and order the expensive T-stat LOL), it's an investment well worth it IMO. Any suggestions would be helpful. I have 2-3 weeks before my BP arrives.