Can Anyone See From These Pics Why My Cory Died?

[SuperColey1]

I bought 6 black cory schultzei 6 weeks ago and they have been great. However last night I found this one (I think female - about 2 inches and broad.)

She was floating at the surface mouth upward. The other 5 are OK and feeding as per usual:

As you can see from the pics she was very fat but then so are a few of the others. From reading I assumed this was pretty normal as they do eat even when there is nothing to eat I have been dropping a few boiled & shelled peas once a week in case of constipation. Their other foods are flake daily. algae pellets every other day and frozen bloodworm once a week.

They are all in a heavily planted 33USG tank with 12 microrasboras and 50+ cherry shrimp (they don't stop breeding.) All other inhabitants are fine and dandy. Temperature is between 24ºC and 25ºC.

The pics are below:

Any advice/observations would be gratefully received.

AC

 

[drewry]

hi SuperColey1

sorry for your loss
i know how it feels as i lost a few black corys myself a few months ago.
sometimes its hard to say what caused it to die without any sings of disease some times corys die and you never find out why.


cheek your water stats.
and just keep an eye on the others.
good luck with the rest

 

[SuperColey1]

I'm one of those planted nuts that has no test kit. lol.

I know there is not much wrong within the tank because the shrimp would be first to go. A simple ammonia spike, not even at the level of a mini cycle would wipe them out. I would also be getting algae.

Can't work it out. Could it be internal parasites? Seems very red underneath, worms maybe?

AC

 

[geezer2008]

That swollen stomach doesnt look good. And is that a red anus i can see? If so, i would say internal parasites of some sort mate.

Sorry to hear of your loss, dont lose heart though.

Also, just noticed from your post that you found him/her floating at the top of the tank. This could possibly indicate a swim bladder problem.