Tarantula setup question

[TonyL]

I have had my B. boehmi about a month now and she has been a blast! She is a 3 1/2 inch female and currently in a 5.5 gallon tank with about 2 inches of a soil/peat moss/vermiculite mix. She has a couple of hides.

I am now thinking about moving her to a bigger tank. However I was reading in the Shultz manual that Ts should never need more than a 10 gallon tank. I would like to move her to a 20 gallon tank with many hides and about 5 inches of substrate to let her burrow.

I do not want to stress her out so I am looking for any advice/comments from experienced Tarantula keepers.

Thanks in advance