When your pond fish are infected with a bacterial, fungal, or parasitic disease, medication will be required. PetSolutions offers a variety of medications to treat all types of koi and pond fish. We offer medications to treat pond fish for diseases including ich, fungus, lice, anchor worms, bacterial infections, fin and tail rot, and more. Adding small amounts of pond salt can also help aid in the recovery process. Information on the different types of pond fish disease and parasites most commonly found can be located in our Pet Care Corner information section.