Flat worm exit, 99% down

[Snoop Dog]

I vacumed up as many of those suckers as I could, then put in the recomended amount. Man does it kill them!!!

I placed carbon in after about 1/2 hour and left the tank for about 7 hours now. All polyps are in, clams are closed shut. Kinda quiet and spooky...

I did a 20 Gallon water change and I figure Ill let things be.

If this does not kill them all, when whould I do another dose?