My new silver aro has an anchor worm on its dorsal fin. I am letting the lfs that sold it to me pull it out and look at it (they say they never noticed it). I plan to keep the fish assuming everything works out. The aro is in a tank with synodontis and a clown knife which supposedly can't take normal levels of many meds (w/copper in them?). What meds should I use? Do I need to use an antibiotic for the fish and a chem to kill the ancor worm eggs? I am beginning to lose faith in my lfs so any shared experience or tips would be appreciated.