You need to move it to a quarantine tank and medicate it. Give the fish a freshwater bath in dechlorinated tap water, not RO/DI, for 2-5 minutes. make sure the temperature is matched and the water is well oxygenated. Then move the fish to a hospital tank with copper, formalin & methylene blue.
Methylene blue acts as an oxygen delivery system to aid in fish respiration. Formalin will treat a variety of parasites and fungal infections. Copper also treats parasitic infections.
It's hard to say what the exact problem is without seeing the fish, but it's probably gill flukes. If you are able to confirm gill flukes, a saltwater bath in 6 drops per gallon formalin for an hour with an air diffuser or small powerhead to keep oxygen levels from dropping. Hikari sells a product called Prazipro that contains praziquantel. It is an effective gill fluke treatment along with other external worms. It can be added to food for internal parasites, but your fish doesn't appear to have that problem.
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06-19-2010, 01:13 PM
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