Arboreal snakes live in the trees. Corns are not true arboreal.
They do enjoy climbing, however. How long are you looking at keeping your snake in this enclosure? Up to about 2 years of age, it will fit fine in that tank...but I wouldn't keep a full grown snake in a 25 tall tank. That's just too small. If you want to see them climb, then a 29 would work...it's the same base size as a 20 long; however it is 18 inches tall vs 12. I would reccomend to have climbing structures...but I would also reccomend a 55 gallon tank for a full grown corn. This will give plenty of room for play, stretching out, and climbing.
All snakes are different, however. Some enjoy climbing a lot, some couldnt care less. I have goo examples of both in my collection.
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-Chris
The reason mainstream thought is thought of as a stream is because it's so shallow. -George Carlin
A fool doesn't learn. A smart man learns from his mistakes. A wise man learns from the mistakes of others. Which one are you?
My Website
Rat/Corn snake care sheet I wrote
Current snakes:
0.1 Licorice Stick Black Rat (Lola)
1.0 Black Rat (Frankie)
1.1 Texas Bairds (Jose and Rosa)
0.1 Blue Beauty (Brunhilde)
1.0 Green Tree Python (Claudius)... coming soon