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[0] Protozoa (Skin Parasites) [2] White spots on body and fins, scraping body on rocks (flashing) [4] Avoid adding the water from the bag of new fish into your aquarium, and discard the water in the fish bag. Quarantine new fish before adding them to your aquarium in a separate isolation tank. [3] 
Treat water with Formalin, Malachite Green, Acriflavine or copper sulfate.
Diagnosing Fish Ailments: How To Analyze and Treat Problems. | PetSmart
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