Who Poisoned Dumbledore?

[Valerie Frankel]

No: HPFGUIDX 181441

I believe the locket basin DOES refill on its own, though an alarm
system would be more logical. When Voldemort arrives, he can see
through the now clear liquid that there's no locket, suggesting the
locket/Horcrux/evil soul's presence makes the liquid murky. That's my
take.

Valerie Frankel
Author of Henry Potty and the Pet Rock:
An Unauthorized Harry Potter Parody