Keeping corydoras????

[ginty]

I seem to have problems keeping corydoras.
Ive had 5 die in 4months. They all seem to die the same way. They start swimming deformed. The last one i found ill was just floating upsdie down on the top of the water. I boiled some frozen peas and popped the skin off. By the time i did that it had died in the hospital tank.
I have one left. My water paremeters are
Chlorine. 0
Ph. 8.0
Kh. 15°d
Gh. 8°d
Ammonia. 0
Nitrite. 0
Nitrate 25
Teperature is. 25.2°c

I feed them catfish pellets monday,wednesdays and fridays and i feed my other fish hikaria tropical fish micro pellets.
I only have one peppered cory left. I want to get him some friends but im now scared because there is obviously something im doing wrong.
I have two platties, two guppies and 3 danios in my 110 litre tank.

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[Brookster123]

What are you testing your water with? Sounds like a water quality issue. Does this behavior happen after eater changes? How long did you have them prior to spiraling off this mortal coil?

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[ginty]

Im using api liquid tests.
Sorry what do you mean eater changes?

And its happened only with the corys. I only started getting them about 4months ago. Ive had all my other fish in that tank for around 9months.

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[Coursair]

Your Ph is on the high side, but many Cories are farmed and not Wild Caught.

I hope you figure it out. Do you use Salt ?


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[ginty]

Nah. I dont use any salt. Because im not sure if it will harm my other fish.

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[SNorlin]

Cory's don't like salt, please don't use it, I did when I was treating another fish and my Cory's hated it.


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[ginty]

Cory's don't like salt, please don't use it, I did when I was treating another fish and my Cory's hated it.


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Ok. I will not do this. Ive put my last remaining cory in a hospital tank now. As he seems to lay still on the bottom but keeps rising. I fear he is heading in the same direction.

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[ginty]

Ive also added some shelless mashed frozen peas

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[SNorlin]

Rising? Like floating when he is not trying to move?


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[SNorlin]

Do you think he might have a swim bladder problem? Have you tried treating for bacterial infection? Might want to turn light off too if you have one.


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[absolutangel04]

Have all of your cories come from the same place? There have been several stores in my history of fish keeping I have learned to just avoid because everything I ever got from there died within a matter of months. I found one individual store where nothing I purchased from there ever lasted longer then about 3ish months. Sometimes, the issue can be the supply rather than your tank. Just an option worth looking at. At a glance, your tank seems fine. I agree that most regularly available cories shouldn't have an issue adapting to your pH. It is a tad high, but I doubt that is your issue here.

 

[ginty]

Rising? Like floating when he is not trying to move?


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Yeah this is what i mean. I woke up this morning and it has stopped.


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[ginty]

Do you think he might have a swim bladder problem? Have you tried treating for bacterial infection? Might want to turn light off too if you have one.


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Im in the uk. Do you no what would be best to treat this?

Would this affect the fish if i treat for bacterial problem and that wasnt the problem? Also wouldnt the bacterial infection spread to my other fish? Not just the corys?


Might be a swim bladder problem. But this keeps happening to all my corys.


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[trennamw]

Eater changes ... He meant water changes.


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[Eggheadfish]

Also looking at your pictures the cory looks like his barbels are very small...what type of substrate do you use? I had problems with cories getting sick when they hurt or eroded their barbels on dirty gravel, just a thought! I hope he survives!

 

[Eggheadfish]

Here's a pic of my cories and the barbels are quite long even on the small ones. The second pic shows injured barbels on a sick fish, much smaller and you can see that some sort of opportunistic fungus/bacteria took over

 

[ginty]

Also looking at your pictures the cory looks like his barbels are very small...what type of substrate do you use? I had problems with cories getting sick when they hurt or eroded their barbels on dirty gravel, just a thought! I hope he survives!

I think this was the problem. I have white stones as my substrate. Same as the petshop i got them from.
I wont get any more as i think maybe my substrate is damaging their barbels.
Sadly, i woke up this morning and my fish had died.
I put him in a hospital tank as he was struggling to swim the righ way up. And when he stayed still on the ground he seemed to float up to the top.
So i put him in a hospital tank with plents of aeration and made it so the water surface just covered his body. He lasted 3 days. On the 2nd he seemed alot better but just got worse on day 3 and died by the time i woke up.
I wont get these again and ill got to my petstore and let them.know they are giving out the wrong information on these fish.

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[trennamw]

So sorry you lost a fish.

I'm not sure you answered about your water change routine?


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[Eggheadfish]

Hi ginty. So sorry you lost the fish, but don't let it discourage you! Cories are great hardy fish when kept in the right conditions and come from a reputable source. We all have trials, errors, and misfortunes in the hobby. I'm sorry I can't offer a definitive answer on what happened.

 

[ginty]

Hi ginty. So sorry you lost the fish, but don't let it discourage you! Cories are great hardy fish when kept in the right conditions and come from a reputable source. We all have trials, errors, and misfortunes in the hobby. I'm sorry I can't offer a definitive answer on what happened.

I think im using the wrong substrate. I cant really afford to change it to sand.
The fact that ive lost 6 in 4months really worries me. I wouldnt really want to buy fish half knowing that they could die because ive got stones for substrate. I do try my very best to look after my tank and fish. Ive got 4 baby platties in another tank that were supposed to go in the big tank this weekend, but im going to leave it now until i know there isnt a problem with the tank.

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