Depends on the sort of infection. If it's a parasite infection, pesticides would be used. Bacterial infections are treated with antibiotics.
Oh, please DO TELL which pesticides fish farmers use for parasites, pretty please? With sugar on top?
There are NO pesticides used in US fish farming -- none are legal. The Canadians use a product called "Slice" which is basically Yvermectin, to control sea-lice in salmon. Not legal in the US.
For parasite control we use either salt (table salt, to be correct), Hydrogen peroxide, or potassium permanganate. We are allowed to use formaldehyde as disinfectant (for saprolegnia fungus) on salmonid eggs, only.
99% of parasite control is done by husbandry practices.
As far as anti-biotics are concerned, there are no legal antibiotics for tilapia culture in this country. None.
Pesticides.... what a crock.
