So I need some advice, I'm getting my first ball python very soon and she's already a year and a half old. She's 18 inches long and decent healthy weight. My breeder had told me a 20L reptile enclosure will be fine for her until I have to upgrade to a 40 gallon. I'm wondering though if I could just get a 40 gallon enclosure and she would be fine or if I have to get a 20L? Also wondering if 40 gallon enclosures only come as breeders or if there's such a thing as a 40L or of they are the same thing.

Just need advice!

Thanks