Already everything covered about Melafix and Pimafix from API.
Just to emphazise: Melafix: All natural antibacterial remedy for the mamagement of aquarium fish deseases: aids healing of damaged fins and open wounds, use when introducing new fish to the aquarium.
Pimafix: All natural antifungalremedy for the treatment of aquarium fish deseases. Rapidly treats fungal infections on body and fins. Also treats internal and external bacterial infections.
This is whats printed on the labels. I always keep it, like I keep painkillers in our little "home pharmacy"
So in case sth happens, this is the first thiny I use and most times it is sufficient, as I watch our fishies every single day.