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[0] Crustacea [1] Fish Lice (Argulus) [2] Small 1/2” discs that move across the skin of the fish or through the water [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] 
Add Trichlorfon or Dimilin to water.
Diagnosing Fish Ailments: How To Analyze and Treat Problems. | PetSmart
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