How many will fit?

[d_virginiana]

Did you mean a 20 Gallon or a 20 Liter? In the first post you wrote 20L... Because a 20 Liter is about 5 gallons, which would be too small for even a fairly young snake.

Like Steve said, a 20 long is good for a couple babies, but they'll need to be moved as they grow. A 20-25 gallon is okay for one adult, but the more room the better. My 2.5 foot adult eastern is perfectly happy in a 25 gallon, but even being totally blind he utilizes every bit of floor space in it as well as some hanging vines I've installed. They're very energetic snakes.

Most garters end up around 2.5 feet (males) to 3.5 feet (females). There are some species like Northwesterns that are considerably smaller, but a lot of the more commonly sold species like Easterns and Radixes usually fit in that size range.

Temperament seems more based off of species than gender. Males are generally more active, while females prefer to stay still more, but both settle down equally well. Just a heads up though; your buying options are going to be pretty limited this time of year since breeding goes on in the spring. Do some research on exactly what you want before getting one.

[tress29]

Just a heads up though; your buying options are going to be pretty limited this time of year since breeding goes on in the spring.

Since I'd rather not pay shipping, I will probably be limited to whatever Jason has left after the reptile show last weekend!