Some diseases of pinktail chalceus fish are parasites, bacteria, Lymphocystis, and gas bubble disease. To prevent your fish from being infected, water quality is important. Pinktail chalceus fish or also known Chalceus macrolepidotus is a very active yet shy fish. They can live both in a group and solo. For tropical fish hobbyists, pinktail chalceus fish is not their favorite. It is because of their big size. Maintaining them in a tank is rather easy because they are not easily infected. Still, there are some diseases of pinktail chalceus fish that you should beware of. Here are some common illnesses that may attack your pinktail chalceus. Parasites Parasites can infect pinktail chalceus fish and other freshwater fish. Several different parasites can attack them, but the most common parasites are Chilodonella, Argulus spp. Or fish lice, learnea spp. or also known as anchor worms, white spot disease that is caused by ichthyophthirius multifiilis, trichodina, and mongenean trematodes or ...