Big fish problem will he be ok ?

Question

ok one of my black tetras is a little smaller than the rest and earlier today the bigger one must of been fighting him cuz part of his fin is missing so now hes hiding under a rock and if he does swim he swims really slow and on his side will he be ok and wut can i do to hlp him and i cant really get him to eat

Answer 1

Quarantine it untill it gets better.

Answer 2

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Answer 3

get a place o place him until he is back to normal ina cicluded spot they can be moniterd more and are more likly to eat because they do not have to fight for food