I'm not sure exactly what size that tank is but for the most part 20 gallons or larger is good. Normally for males a 20 gallon is good for most of his life unless he happens to be really active at night. I personally kept mine in a 20 gallon and just recently switched him over to a 40 as he grew but the 40 was just too big for him, there was just too much space in it and no matter how much greenery and stuff I filled it with he was just very stressed out, ball pythons like small enclosed spaces. so he is back in the 20 for now
I got my 1620g 4.5' pied girl in a 4x2 AP T8 with a shelf. In my opinion, you can never go too big. Size is a direct reflection of available funds at the time. Just clutter it up and they will be fine. Just like the wild, they dont live in a 3x2 chunk of land but they do have lots of places to hide.
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