Hi , My name is Bruce Tonner , and I have been raising tarantulas and other inverts for over 40 years. I build tarantula habitats with tall two door tanks with window foam , and than tube poly with coconut shred substrate over it.After carving the dried foam and inserting rock or slate to provide a natural look , the tanks come out looking very jungle real and last for years. I have pokeys in a few of them. If anyone wishes to know the steps to do these tanks just contact me at my e-mail address . Thanks for reading my post .