They might be common diseases, but it doesn't make finrrot, mouthrot and cotton wool disease any less harmful. Minimise the problem with Anti Fungus and Finrot. This antibacterial and antifungal treatment will treat affected fish and prevent the disease from spreading in your aquarium.
Use for treating against mouth rot (Columnaris sp.), fin rot (Psuedomonas sp) and cotton wool (Saprolegnia sp.) fungus.