If I remember this is the snake that was living with the anoles, frogs and fish yes? I remember that thread.
I'm glad you put her into her own tank but it's obviously not secure enough. And unless the other tank was left open I'm not too sure how she would have lifted the screen top.
Clips need to be on all four sides of her new enclosure, as well as clips on the other enclosure for their safety. Cage clips are like 2$ a package so their worth their weight in gold.
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