I've been told that a enclosure that's to large can stress out your T. Is there validity to this? And if so why? Thanks in advance.
Interesting thanksA larger enclosure can make it much easier to operate with a defensive or nervous species.
If they can find feeders & the water dish, fine.
You can switch out hides for larger ones. as the tarantula grows.
For ones that have a strong feeding response, you can use a larger enclosure as well because they will run down the feeders.
A geniculata is a good example of this.