Unknown causality

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Um hi everyone, i had a koi about 6 inches long out of nowhere go belly up. He is not dead though, but instead has a very hard time swimming and keeping itself bouyant. I figure it's something to do with the swim bladder. Any idea what could have done this OVERNIGHT? The fish was fine two days earlier and i was wondering what could have caused this. Ty for any information
 

sissy

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info on filter and also overfeeding to early for filter to be working
 
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I had a fish once that I think was struck on the side by another fish, injuring the bladder. Or, it could have been hard contact with a rock, etc, trying to outrun another. I rehabbed him and eventually, he was able to swim upright on his own, but it took a while.
 

Mmathis

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@SpencerB518 Can you please give us more information about your pond and set up?

  • How big is your pond?
  • How many & what size fish do you have?
  • What kind of filtration do you have?
  • How long has your pond been up & running?
  • Do you test your water? It would be helpful for us to know what your water parameters are: ammonia, nitrite, nitrate, pH, KH
  • Have you recently added any new fish?
  • If new fish were added, did you quarantine?
  • Has anything changed with your pond recently?
  • Do you add any chemicals/medications/etc. to your pond?
 

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