sorry for the disgusting subject matter, but today I saw a worm coming out of Dory's bum [puke] Luckily I have some treatment stuff here from when we got Nemo, so I have started the treatment, but am confused, it says to treat her every 2 weeks for 12 weeks (so 6 treatments) so does it kill the worms straight away or take 12 weeks to clears up???