So I have this food-
You can probably get it at any big-box retailer;
Jungle-Medicaded fish food-Anti-parasitic
From the PetsMart website; "Pond Anti-Parasite Medicated Fish Food
Aids in control of internal flagellates, trematodes, and cestodes, which includes hexamita (hole-in-the-head), spironucleus, intestinal worms, tapeworms, and nematodes (e.g. camallanus). Directly treats infected fish and protects against secondary infections. Great for use as routine prevention against disease. Feed exclusively for 3 consecutive days a week for 4 weeks. Do not use other foods during the 3 day periods. May be used with external water treatments and antibiotic/fungal/parasitic treatments. Will not cloud water. Is ruminant meat and bone meal free."