Go Back   Aquarium Advice - Aquarium Forum Community > Freshwater > Freshwater & Brackish - General Discussion
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 10-27-2022, 05:14 PM   #1
member
 
Join Date: Oct 2021
Posts: 12
Cories keep dying

Corydora keep dying. Only having problems with the cories. First time I lost 2 after being in the tank for about 3 weeks but that was from them getting stuck between rocks so I redid the scape. Another time was a loss after a stressful egg laying session. Another time was the runt of the pack who probably got bullied/stressed. Another time no clue. I try to maintain a group of 12 but never seems to work out.

Well established heavily planted 90 gallon tank with sand bottom. Plenty of nooks/crannies/hiding spots. Probably a good 3 or 4 inches of plants to every inch of fish. Angelfish, keyhole cichlids, black neons, and tons of snails all of which are very happy and never lost any of them over the life time of the tank. Well, 1 neon got wedged behind the heater but thatís his fault for being dumb. Running with plenty of filtration and on top of maintenance. Temp running76-77. I have 2 air stones in there as well. No chlorine and no ammonia issues. Ph arguably between 7 and 7.4 depending on whoís eye but regardless it stays consistent which is what matters. Nitrites are zero and nitrate doesn't go above 10ppm or below 5ppm. I do small water changes, usually two per week, 3 if it really needs it but not often. Never been a fan of 1 large water change. In my opinion I think it helps with overall tank stability with a less drastic change in conditions like a large one does. However, if something catastrophic happened and the system was crashing then larger water for sure.

They eat whatever the big guys miss but they also get their own food and a variety to boot. Omega sinking shrimp pellets, hikari algae wafer, bloodworms, bug bites. They get some during the day when the other fish are fed but I also come back to give them their own food right before itís lights out.


What can I do to possibly correct this trend?

__________________
DonkeyCheese is offline   Reply With Quote
Old 10-27-2022, 10:38 PM   #2
Aquarium Advice Regular
 
starfish615's Avatar
 
Join Date: Jul 2013
Location: california
Posts: 57
Hmm can I ask what type of Cory you have been trying to keep? No other large bottom feeder in tank like Pleco etc? Sounds like you have a good amount of hiding spots but you ever notice the cichlid or angles harassing them? I have found that Cory do not handle stress well. I also was unsuccessful trying to keep them with cichlids myself but it was years ago and I will admit I didnít know much back then lol
__________________
starfish615 is offline   Reply With Quote
Old 10-27-2022, 11:21 PM   #3
Aquarium Advice Addict
 
Join Date: Oct 2022
Location: Perth in Western Australia
Posts: 1,757
Pictures and video of the fish and the entire tank so we can check them for diseases and abnormal behaviour?
You can upload videos to YouTube, then copy & paste the link here.
If you use a mobile phone to film the fish, hold the phone horizontally so the footage fills the entire screen.

Check pictures on your computer before posting and make sure they are clear and in focus.

-------------------

What sort of filter is on the tank?
How often and how do you clean the filter?

Do you gravel clean the substrate when you do water changes?
So you dechlorinate the new water before adding it to the tank?

What is the GH (general hardness) and KH (carbonate hardness) your water supply?
This information can usually be obtained from your water supply company's website or by telephoning them. If they can't help you, take a glass full of tap water to the local pet shop and get them to test it for you. Write the results down (in numbers) when they do the tests. And ask them what the results are in (eg: ppm, dGH, or something else).

-------------------

Runts (fish that don't grow as fast as the others) are usually suffering from intestinal worms or have a genetic defect.

Do you feed the fish any frozen or live foods?
__________________
Colin_T is offline   Reply With Quote
Old 10-28-2022, 08:20 AM   #4
member
 
Join Date: Oct 2021
Posts: 12
Ive kept albino, bronze, sterbai, juli, peppered, and panda, I’ve kept them in 20 gallons, 40 breeders, 55, and most recently my 90. Best luck I had was species only while breeding.

The angelfish are great with them. No signs of fin nipping or overall aggression. There’s an occasional “get out of my way” since cories do not understand how to travel around a tank and just do and go wherever. Besides that the angels don’t even notice them. As far as keyholes, they shouldn’t even be called cichlids. They are more like big dumb mollys then a Cichlid. They are not big either, around 4in. Probably one of the friendliest fish I’ve kept. Exact opposite of what you would think a cichlid is. Of course they can and will still act differently for others and are still a cichlid but nothing like the other cichlids out there.

I’ve kept corydora in a rainbowfish tank. I’ve kept in a swordtail tank. I did honey gourami at some point. I’ve done small community with stuff like harlequin rasbora* and rummys. Had issues in all of them.*Best tanks I’ve had for them was a 20 long shrimp tank and solo tank when *breeding.

Is there a different bottom feeder you’d suggest? Dwarf chain loach, yoyo loach, Pictus?
__________________
DonkeyCheese is offline   Reply With Quote
Old 10-28-2022, 12:44 PM   #5
Aquarium Advice Addict
Community Moderator
 
Aiken Drum's Avatar
 
Join Date: Apr 2019
Location: Derbyshire, UK
Posts: 5,469
It looks to me that you have had 4 seperate incidents, 3 of which you have identified the cause of death and they are unrelated.

There doesnt appear to be anything obviously wrong with what you are doing and no common cause with the deaths.

Just bad luck.
__________________
Aiken Drum
Community Moderator
Aiken Drum is online now   Reply With Quote
Old 10-28-2022, 02:09 PM   #6
Aquarium Advice Freak
 
m.j.gomez's Avatar
 
Join Date: Jan 2019
Location: Farmington, n.m.
Posts: 358
Quote:
Originally Posted by DonkeyCheese View Post
Corydora keep dying. Only having problems with the cories. First time I lost 2 after being in the tank for about 3 weeks but that was from them getting stuck between rocks so I redid the scape. Another time was a loss after a stressful egg laying session. Another time was the runt of the pack who probably got bullied/stressed. Another time no clue. I try to maintain a group of 12 but never seems to work out.



Well established heavily planted 90 gallon tank with sand bottom. Plenty of nooks/crannies/hiding spots. Probably a good 3 or 4 inches of plants to every inch of fish. Angelfish, keyhole cichlids, black neons, and tons of snails all of which are very happy and never lost any of them over the life time of the tank. Well, 1 neon got wedged behind the heater but thatís his fault for being dumb. Running with plenty of filtration and on top of maintenance. Temp running76-77. I have 2 air stones in there as well. No chlorine and no ammonia issues. Ph arguably between 7 and 7.4 depending on whoís eye but regardless it stays consistent which is what matters. Nitrites are zero and nitrate doesn't go above 10ppm or below 5ppm. I do small water changes, usually two per week, 3 if it really needs it but not often. Never been a fan of 1 large water change. In my opinion I think it helps with overall tank stability with a less drastic change in conditions like a large one does. However, if something catastrophic happened and the system was crashing then larger water for sure.



They eat whatever the big guys miss but they also get their own food and a variety to boot. Omega sinking shrimp pellets, hikari algae wafer, bloodworms, bug bites. They get some during the day when the other fish are fed but I also come back to give them their own food right before itís lights out.





What can I do to possibly correct this trend?
Hello, this is just a suggestion but you may want to add something for circulation. Cory's are bottom dwellers & in planted tanks no matter how good you clean there is stuff that gets trapped.
With a power head or wave maker you can dissipate anything that may have a negative affect on them. I'm sure all your fish will benefit from added circulation. Hopefully this helps you!!!!!
__________________
m.j.gomez is offline   Reply With Quote
Old 10-29-2022, 08:20 PM   #7
Aquarium Advice Addict
 
Andy Sager's Avatar
 
Join Date: Jul 2011
Location: Lake Wales, Florida
Posts: 7,623
Quote:
Originally Posted by DonkeyCheese View Post
Ive kept albino, bronze, sterbai, juli, peppered, and panda, Iíve kept them in 20 gallons, 40 breeders, 55, and most recently my 90. Best luck I had was species only while breeding.

The angelfish are great with them. No signs of fin nipping or overall aggression. Thereís an occasional ďget out of my wayĒ since cories do not understand how to travel around a tank and just do and go wherever. Besides that the angels donít even notice them. As far as keyholes, they shouldnít even be called cichlids. They are more like big dumb mollys then a Cichlid. They are not big either, around 4in. Probably one of the friendliest fish Iíve kept. Exact opposite of what you would think a cichlid is. Of course they can and will still act differently for others and are still a cichlid but nothing like the other cichlids out there.

Iíve kept corydora in a rainbowfish tank. Iíve kept in a swordtail tank. I did honey gourami at some point. Iíve done small community with stuff like harlequin rasbora* and rummys. Had issues in all of them.*Best tanks Iíve had for them was a 20 long shrimp tank and solo tank when *breeding.

Is there a different bottom feeder youíd suggest? Dwarf chain loach, yoyo loach, Pictus?
There's a couple of things that may be in play. First off, you say you kept all these different varieties and in with all different kinds of set ups yet had problems with them all. If this is true, you need to look at the set ups for water temps, substrates, wild fish/ tank raised ones, etc. Did you lose them all at a similar time or did you lose them from occasional deaths or accidents? Most Corydora cats come from rapid flowing, highly oxygenated water so if you don't have that in your setups, that could be a reason for your failures. ( For example, your honey gourami tank should have had slow moving water which is the opposite of what corydoras need. ) Keeping shoals of corydoras ( or any kind of fish) is not always easy. When you lose a fish here and there, hierarchy issues or too many of one gender issues could have caused these problems. When you lose the fish en mass, that's usually a tank/water caused situation. Certain wild caught species are more prone to diseases ( internal more than external) that may be the issue. Just a lot of possibilities. You really need to dig into the set ups you had for them.

As MJ Gomez suggested, a circulation pump might solve your issues. It might explain why your success(es) came when the fish were by themselves. If your issue is lack of oxygenated water at the bottom, none of the loaches or Pictus you listed would be a good substitute as they all need higher oxygenated water.

Hope this helps.
__________________
Andy Sager is offline   Reply With Quote
Reply

Tags
cories, dyi, dying

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale/Trade: My sterbai cories for your panda cories Fdsh5 Archive 0 06-09-2013 11:05 AM
Why do my cories keep dying? hb1547 Freshwater & Brackish - Unhealthy Fish 3 09-18-2012 02:15 PM
what temperature do I keep cories ?? Bubble_B0y Freshwater & Brackish - General Discussion 7 09-12-2005 04:40 AM
Fish are dying, dying and then dying reefobsessed Saltwater & Reef - Sick Fish or Coral 5 03-26-2004 12:30 PM
dying cories...help!!!! shawmutt Freshwater & Brackish - Unhealthy Fish 10 09-04-2003 08:07 AM







» Photo Contest Winners







All times are GMT -4. The time now is 04:45 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.