Prazi pro is for internal parasites, I am looking now to see if it is specific for Camillanus.
... seems it is not.
Levamisole will work.
Fenbendazole will work.
"Camillanus is easily recognized as a small thread-like worm protruding from the anus of the fish. Control of this nematode in non-food fish is with fenbendazole, a common antihelminthic. Fenbendazole can be mixed with fish food (using gelatin as a binder) at a rate of 0.25% for treatment. It should be fed for three days, and repeated in three weeks."