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My aquarium fish have skin issues and are behaving abnormally. Help!

Updated On September 23rd, 2025

I have new aquarium with few gold fish and milky white carp fish. Some skin problems is infecting in all my fishes like skin coming out. And all fishes are showing abnormal behavior. Please help me fr saving my fishes

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1 Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on August 14th, 2018

This may be a severe ich infection. It is an ectoparasite that can affect fish. You will need to treat the entire tank. You can use a commercial ich medication found in most pet stores. Follow label directions carefully. Quarantine new fish for 2-4 weeks before adding them to the main tank. Another option would be to gradually increase tank temp to 86 F and hold it there for 2 weeks. This will speed up the lifecycle of the parasite. Once all the spots have dropped off the fish, perform a partial water change, vacuum the substrate and sanitize any tank furniture. Afterwards, gradually decrease water temp back to normal for goldfish, between 65 F and 72 F. Plain aquarium salt (NOT table or Epsom salt) can be used at 1 tablespoon per 5 gallons of water to aid in treatment and recovery. Since goldfish are cold water fish, this method may be stressful to them. Consider adding in a bubble wand or air stones to increase oxygenation during this time period.

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