[Huh, okay, he isn't a survivalist type so he's clueless here, but his best guess is that the tablets must cause some chemical reaction that kills harmful bacteria and the like without being strong enough to hurt a person. There could be some fancier method he doesn't know about, though.]
If that's the case we could try asking Aurora for some. It couldn't hurt.
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If that's the case we could try asking Aurora for some. It couldn't hurt.