just lost my cory

[donk18]

yesterday i noticed that my cory had a red spot on each side of his head where his ears would be. he stoped being very active and today i found him dead. do you have any idea what caused it. it looked like blood but i am not sure. i just put an angle fish in so i am wonder if it carried something into the tank.

 

[Hooked Newbie]

Sounds like ammonia poisoning. What are your water parameters? How'd you cycle the tank? What other inhabitants?

 

[donk18]

ammonia 0, nitires 0, nitrates 10. the tank has been completely cycled for about two and a half months. 7 zebra danios, 4 white skirt tetras, 3 dwarf gramies, 2 dalmation mollies.

 

[Hooked Newbie]

Hmmm.... What sized tank and what test kit are you using? Strips or liquid? Are you adding salt by chance? I'm fishing here (pun intended)...

 

[donk18]

29 gallon,(i know a bit over stocked, running a 60 gallon filter so all is good), api liquid test kit (up there with the best i believe), no salt. the only guys in there that need the salt are the molleys but they are doing great with out it.

 

[Hooked Newbie]

I must admit that I'm stumped, it sounds like you have everything right.... How long was the cory in the tank?

 

[donk18]

i have had him about a month now.

 

[BetaBetta]

I am depressed and share your pain. I just lost 2 cories to what I suspect is metal poisoning.

 

[PikeCichlid]

Yeah,these seem to be the proverbial "canary in the mine" as far as fish go.Do immediate 10% WC's.And follow that until you feel safe.Bio load aside,there is nothing like a fresh dose of nitrate-dilluting fresh water

 

[Cory Lover]

I'm stumped aswell.

If you incounter that problem again, be sure to do a 25% water change right away.

Corydoras tend to just die, since many are sold to young or are wild caught.

What were you feeding yours?

Matt