If it's a plumbing leak, there is no danger at all in closing the pool.
If it's a liner leak, you may well regret closing the pool before solving the issue - in the best case, you'd need to replace the liner, in the worst (though unlikely) you could end up with wall issues, come next spring.
I would do the bucket test, combined with a vessel test to see where the issue is before closing.
If you need help on performing these tests, just give a holler![]()
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