Congrats on your beautiful carpet!
As far as the ET 2x2x3 cage, that will be a good temporary cage. I'm glad that you are thinking "tall". IMO, that cage may be good for 1 1/2 to 2 years of age +\- .
My Jungle Carpet has just about outgrown her first cage. She will be moving into a 4X2x3 foot high plastic enclosure . She is highly arboreal, 50% of the time she is soaking in her water dish and the rest of the time being perched up high. She is never cruising or laying on the ground. She is almost 2 yrs at 4 1/2 feet + long.
I have room for a 3 ft high cage so I'm going to give it to her since she is my favorite display snake to watch. A 4x2x2 would be a good compromise and work well if I did not have the room.
Since IJ's are considered to be the smallest of the Carpets, you may be able to get by with a 3 foot long cage in the end. I would recommend at least 2 ft high, and more if possible. Of course you may only have so much room to work with and have to adjust differently.
In my experience with Coastals and my Jungle, they will use any and all of the space that you provide for them. More space just adds to your viewing pleasure.
![]()