I'm getting an uth today, but just a few questions before i get it and set it up. I am so new at this.

What size would you recommend, should it go under 1/2 the tank or 1/3?

Are there any particular brands of uth or thermostats you would recommend?

Do I place the heater directly on the wooden dresser under the glass? Is that safe?

...also the hideaway I have is pretty big, and my bp is pretty small right now. the woman at the pet store told me to get the big one so he could grow into it. however i keep reading that it should be tight fitting. She also didn't tell me I needed 2. Should I get 2 smaller hideaways while I am out? And I actually stood the climbing branch up so that its verticle...it opened up a bunch of space.