Swimming pools have acid pumps to adjust the pH balance of the water. They're usually not connected to the Internet.
At least one of them is, though. So, exactly how powerful and toxic is this acid pump?
"Can we turn people into soup?" wondered Tentler.
Tentler said there was no distinguishing text in this app to tip him off to where the pool was located or whom it is owned by, so the owners haven't been contacted. Enter at your own risk!
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