Mobile Uploads Pathogens that cause diseases are in and around your fish’s natural setting and in your aquarium. They may be bacterial, viral, fungal or parasitic.So when the fish's skin or tissue gets damaged, whether from shipping, netting or any other circumstances, bacterial and fungal pathogens seize the opportunity to infect the fish.Poor water quality also weaken the fish's immune system.Have a look at the chart below to identify several most common infections. More... posted via automatic Facebook Feed