My beardie is about 5 months old right now and although he seems pretty comfy in his 20 long, I want to upgrade. I found a good deal on a 40 gallon breeder on craigslist and I know he would love this. Problem is, I really would just like to buy something once and be done with it. I picked up a 4x2x2 on craigslist a couple weeks ago, but the more I look at it, the more I realize it isn't right for a beardie and is much better for a snake. So, how many of you have adult beardies in 40 breeders? Do they seem happy in there? Thanks a lot!