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Discus Fish Disease, Symptoms and Treatment Guide. Your discus fish are important to you and keeping them free of illness is a big challenge. Most discus fish are being imported or sold from hobbyist to hobbyist, making it a risk to go from bag to tank. Everyone, at some point, is guilty of bypassing quarantine tanks in a hurry to add the new discus into their tank. Every time we skip quarantine, we take the risk of introducing parasites and disease to our tanks.

Below are several examples of symptoms and visual cues to look for when trying to spot parasite, bacterial and stages of disease onset. I will do my best to put links to images to help visually diagnose better. If you would like to donate some of your pictures so we could use them on this guide, you can upload them to our Tropical Fish Pictures Forum or email them to and let me know it's cool to use them for this guide. Symptoms and Diseases We will continue to grow this guide to help discus fish hobbyist quickly identify and treat symptoms and diseases.