Ball pythons hide-it's pretty much what they do all the time. Your snake should have two snug identical hides-one on the warm side and one on the cool so she doesn't have to choose security over proper temps. Fish tanks are very exposed and open for a snake, if you covered the sides and back with dark paper and add some greenery/cover to the inside she would likely be more comfortable but generally they only come out at night or when they are hungry.
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