flatworm removal

I know these are flatworms but I’m not sure about the species. Any help on best action to kill/remove from tank would be greatly appreciated. I’ve lost a frogspawn and hammer and keep trying to save what’s left. So far I’ve dipped the coral with just “seachem reef dip”. It doesn’t seem to phase...

I believe I have some flatworms on a frag and have done a freshwater dip to no avail. They didn’t fall off so I’m not sure exactly what I should do I did the dip about 3-4 days ago.