My turtle keeps swimming against the glass?

I got a little painted turtle yesterday and she came in about an inch and a half of very dirty water with nothing in her cage, i cleaned her tank and put some big rocks and a little basking toy in there, she's been eating just fine, she just keeps swimming up against one side of the glass, i have a bigger tank ill be moving her into this weekend (today is wednesday)
My turtle keeps swimming against the glass?
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