Why this cory died?

[softak]

Look at fins, they are like eaten and yellowish stuff on them.
I've lost almost all my cories.

[MatsP]

Sorry to hear that, and I'm unable to say why your fish died from the picture alone - it looks like you have also lost several other fish - is that a Bosemans rainbow?

First thing to check would be the ammonia and nitrite levels in the tank, I'd say.

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Mats

[softak]

Sorry to hear that, and I'm unable to say why your fish died from the picture alone - it looks like you have also lost several other fish - is that a Bosemans rainbow?

First thing to check would be the ammonia and nitrite levels in the tank, I'd say.

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Mats

I've lost in this tank 3 cardinal tetras, 6 endler guppies, 2 L66, 10 green stripe cory, 5 orange stripe cory, 2 Bosemani and 4 blue eye
L66 had a lot of blood on the body before dye.


Did big water change last evening, today lost half of them. Checked ammonia - 0.

[MatsP]

Sounds like you have something horribly wrong in your tank - if ammonia isn't the cause, then I'd say you either have parasites of some sort or a bacterial illness in the fish.

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Mats