One, would a 20gl long suffice? I've heard it does and I've heard it doesn't from different places.

Also, are those little round stick-on thermometers and humidity gauges accurate enough for a garter? Again, I've heard yes and no from different places.

And, do your garters tend to climb a lot? I mean, like on higher branches and things. Or do they generally stay grounded?

That's it for now, but I'm likely to have more soon when I start making lists and things.