Nibbled tail fin on neon tetra?

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Dec 26, 2004
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I noticed part of one of my neon tetra's fins missing. My fish are on my signature. Which fish may have caused it? Also, should I add another neon or any other fish? Thanks! Even if it means I have to go bigger. Thanks!
 
Yes, the neons will be better off in a bigger group--but you will have to upgrade first. The glass cat would also do better in a group--but only if you go to at least a 40.

For the damage--could be a guppy or platy is bugging the neons, could be the result of bacteria. Does the fin appear to have a clean edge, a jagged edge, or just tears?
 
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