I think my hippo has this ... Marine Fungus Other Names: Ichthyophonus, CNS Disease Symptoms: Darkening in color, sandpaper appearance of skin, poor appetite, listlessness. Comments: This disease is usually associated with stress, sometimes brought on by poor water quality. This is not a very common disease and treatment is very difficult. The fungus is usually introduced into the tank when adding new animals. Treatment: Treatment for this disease is difficult. Improve the environment and remove any possible causes of stress. Try a proprietary anti-fungal medication in a hospital tank. Food soaked in phenoxetol can also be effective if the fish is eating. Prevention: Insure good water quality and temperature parameters to prevent animals from getting stressed. Stress breaks down the protective mucous coating on a fish and allows the fungus to gain a foothold. Additionally, any new fish should be given a short freshwater bath and kept in a quarantine tank for two to three weeks before being introduced into the main aquarium MY TANG DEFFINATLY DOSE NOT HAVE ICH IVE BEEN DOWN THAT ROAD AND BACK TWICE OVER . 1.CAN I TREET MY TANK WITH FUNGAL MEDICATION THAT HAS L,R ? 2.IS IT AS HARMFULL AS SOME OF THE ICH TREATMENTS ? 3.CAN I OD MY FISH WITH FUNGAL MEDICATION ?