its fully grown now....about 4 years old...theydont get very big...your thinking about olive pythons i think...same group and very simular...macklotts,olives and water pythons are really simular to each other
nice snake mate glad you have a tame one!!! mine fling s**t around all over the place when there not trying to bite my face off!! LOLOL
really nice i love em....
i hope i dont offend you and i know you said the viv isnt set up properly
but try and make sure the water dish is big enough for the snake to fit fully in!!(may have problems if humidity is too low) i let mine fluctuate between 70 and 90% and have had no probs. i use plant trays from B+Q 26"x12" and there only a couple of quid they do loads a sizes and colours too! and mist twice daily..
you probably already know this but thought id write anyway for anyone else..