A rhp would raise ambient temps. I use two of them. An uth makes a hot spot. That's what they do. I don't know what you're not understanding with what I said.
I may be new here but I'm not new to keeping bps or life. I don't know what that even has to do with anything or why you're targeting me. If you read what I first said, I never said it would definitely work. If the op is going to get a snake anyway wouldn't you want them to have the best chance at keeping it alive? Or tell them it's impossible and just don't help at all?