For one I keep my crested geckos in tubs that size, I have NEVER kept my boas in anything that small, I don't know how you could think those would be proper, your corn looks like you haven't looked at it in awhile, no place to hide, water looks dirty (though that could be the picture)

The biggest thing though is I don't know how you can get a proper gradient in those 'boxes'. The corn though honestly looks like something I would find for sale on craigslist.