Acro eating flat worms

[fishoholic]

I bought a hammer coral for someone the other day that let us know he had flat worms (not sure what kind) in his tank. We did a fresh water dip on the coral for little bit over a minute then we put it in our frag tank. We saw about 3 small worm like things in the water after the fresh water dip. We don't have any SPS corals in our tank, just softies and some lps, should I try the betadine dip method on the coral and turkey blast it or do you think the fresh water dip was enough?