Are fish treated for parasites and fungal infections? Including feeder fish?

Usually you have to treat that yourself because if you have your fish in a tank the tank itself has to be treated also and if you have any other fish that were in with that one specific they all have to be treated usually you can buy that from any pet store and just follow the directions but you have to know what you're treating for so you'll have to look at symptoms and what the fish is doing and the body and all of that should tell you what's going on parasite wise because there's 10 different kinds of parasites or medications and you want to make sure you get the right one or it's not going to help also you want to do this right away so if you've already waited a day or two you want to hurry up and get it done as quickly as possible because otherwise you're going to lose your fish if you wait too long because then it gets to their organs and everything shuts down and you've lost your fish the treatments are usually not more than 10 or 15 bucks depending on what parasite or treating

Not sure best to call location you plan on going to first.

I have always had to treat them myself