Oh Jules, I'm so sorry about your hermie.
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Was the sand the only variable that was different?
We don't have a garage so our open bags sit in the carport. I didn't realize at first that no bag comes sealed, they have a little pour spout that is an unsealed opening. I'm always nervous that bugs or ants will get into them. I keep a couple of 2-gallon ziploc bags with clean dry sand in the cabinet under the tank in case I need some in a hurry.
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