Internal parasites - discus fish disease

Internal parasites in the gut can be assumed, if the fish becomes emaciated or produces white, jelly-like faeces. I have no idea of what species of parasites are infecting our fish, but in most cases heat treatment (as for Hole-In-The-Head Syndrome) and Flagyl given orally cures the fish. To treat the fish, assuming the fish is still eating, soak some live blood worms or black mosquito larvae in a solution of 10 ml of liquid Flagyl to 200 ml of water for about one hour. Then feed the worms or wrigglers to the fish. This treatment can be repeated every 2 to 3 days for 10 days. If the fish is not eating, then the job is a little more difficult. I have had success by removing the fish from the water and placing it on a wet towel and injecting (using a syringe without needle) the medication down its throat. I use a 2 ml syringe and a mixture of 1 part liquid Flagyl, 2 parts of Liquifry (to try and get the fish’s strength up) and 3 parts water. Before returning the fish to the tank wait for the fish to swallow. It is normal for excess medication to be expelled from the fishes gills and mouth. This treatment can be done twice a day, until the fish shows signs of recovery. The treatment of non-eating fish is not always successful.