User blog comment:PitaKang/FANFIC! :D Muggles vs Wizards!!!!/@comment-4207136-20120825163446

lol, JK is horrible at maths but fortunately the book is consistant in most places with the numbers of about 22,000 in Britain. Aqua Eructo is a spell from the games and would not have put out the Fiendfyre since it is equal to the water charm (Aguamenti) which did put out other blazes. Fiendfyre can go out, but none of the six there knew the spell and Aguamenti did not work (they tried it).