What killed my fish?

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swifty

Feeder Fish
MFK Member
Jun 13, 2013
268
1
0
California
Well, I woke up this morning and noticed 1 of my 12 tetras alone from the group. Upon closer inspection he seemed to have a large red mark on his side. He was swimming pretty slow and looked like he was in bad shape. I felt this was a good time to use the vodka/frozen water treatment for a fast euthanization, which surprisingly, it was.

I thought it was some sort of internal parasite or a infection, but after getting a good look, it actually looks like something took a mean chunk out of its side.

It was one of the 4 new long-finned skirt tetras that I bought, of which they're the first fish I've ever bought at petsmart (all other fish have been bought from LFS).

I have a 3.25" firemouth, and 11 long/short fin black skirt tetras in my 29g now.

Could he not have been accepted and attacked by the school, or was he a victim of my firemouth? My firemouth has never shown any aggression to the tetras and was raised with them from 1.5" for the last 7 months.

wx6MLap.jpg

wx6MLap.jpg
 
things that can help us help you

size of tank
filtration
your water change schedual/ cleaning
and do a water test and post the reading

whats in the tank

my guess is the fire mouth but please post the above questions.
 
It's a 29g with two AquaClear 50s. I do 50% water changes weekly. As I said in the post, a firemouth and 11 black skirts are the inhabitants. 0/0/10 readings.
 
Got any pics of the setup?


wKUCuaD.jpg

Kind of what I didn't want to hear but sort of suspected it. Should I continue to keep an eye on him and watch for any other aggression or remove the tetras now?

He's always been skittish and I added the tetras when he was a juvenile because he was extremely shy. I added them as dithers and they worked well for him. I'm wondering if when I remove them he'll return to his shy self.

wKUCuaD.jpg
 
things that can help us help you

size of tank
filtration
your water change schedual/ cleaning
and do a water test and post the reading

whats in the tank

my guess is the fire mouth but please post the above questions.

You need all of that to be able to say a cichlid took a chunk out of a tetra?

Come on. Yes, expect more of the same if you don't get rid of the fm


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