If you have the space for it, upgrading to a 120-gallon tank (4'x 2' x2' or 48" x 24" x 24") is ideal. Maintaining a proper cool side and basking spot temperatures in a larger tank is much easier, and your beardie will have plenty of room to explore and hunt. If you're limited on space and looking for something in between, a 67-gallon tank (48" x 18" x 18") or a 75-gallon tank (48" x 18" x 21") would also work pretty well.
Larger enclosures help bearded dragons regulate their body temperature better because they can easily move somewhere different or hide if exposed to uncomfortable temperatures. When in doubt, prioritize floor space, and make sure that the depth (width) is at least 18 inches, so that your beardie can easily turn around. Fifty-five gallon tanks with dimensions 48" x 13" x 20" are not wide enough to house a bearded dragon, so definitely avoid them.
When searching for the right-sized tank, also be sure to avoid taller enclosures. Bearded dragons prefer having more floor space and can't use vertical space as effectively as other reptiles, such as chameleons.
When searching for the right-sized tank, also be sure to avoid taller enclosures. Bearded dragons prefer having more floor space and can't use vertical space as effectively as other reptiles, such as chameleons.
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