Fungus is a secondary infection to wounds. Did your betta have a patch of cottony growth? Fungus will appear only when the wounds are not treated. They are in your tank as spores and will eventually develop when the wounds are not treated.
Isn't PetCo known for its bad reputation of poor tank maintenance and everything else? I would suggest finding a different source. Plants will carry the spores of fungus. As long as you treat the wounds, fungus is less likely to happen. Fungus rarely occurs. I'd say your betta already contracted it when you bought it.
__________________
Laugh and the world laughs with you, weep and you weep alone.
|