Cory cats dropping dead

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K626

K626

Polypterus
MFK Member
Jan 21, 2008
1,160
141
96
South FL
Ammonia 0
Nitrite 0
Nitrate almost unreadable
Water is hard
Ph 7.5ish


These guys have been totally ok for 2 months. Eating, foraging, active, then just dead. Only other thing in there is a dojo, pleco, and tetras (neon, red eye, etc). Nothing to beat them up. The last two had blood spots internally from belly to head. We started to feed 2x a day thinking they weren't getting enough food. But I'm stumped.
 
K626 said:
Ammonia 0
Nitrite 0
Nitrate almost unreadable
Water is hard
Ph 7.5ish


These guys have been totally ok for 2 months. Eating, foraging, active, then just dead. Only other thing in there is a dojo, pleco, and tetras (neon, red eye, etc). Nothing to beat them up. The last two had blood spots internally from belly to head. We started to feed 2x a day thinking they weren't getting enough food. But I'm stumped.
Click to expand...


Sorry for your loss I had the same happened to me with a group of 9 Pygmaeus Cories start bloating and dieing off but 1 has survived.
 
Sorry for the loss. Think the pleco may have caused this?
 
I don't think the plecos are messing with them at all. There's a clown and a zebra striped one (king tiger or something like it) and they don't really mess with anything. The nerite snails are doing well, and I figured if anything was wrong in there, they'd be the first to be effected. The pepper cory was the only one that bloated. Now the skunk cory and 2 albino long fin cories have just dropped dead. There's only 1 long fin albino, and 1 regular albino left.
 
It's got hornwort floating in it and driftwood. But the wood has been in this tank for months, and a previous tank before. And pieces from it are in a few of my other tanks with no problem.
 
Howdy neighbor,

With what kit do you test the water?

Do you measure TDS?

What's the filter and tank cleaning routine (possibility of old tank syndrome)?

Is the aeration adequate?

Temp?

Temp and pH stability?

How much time passes between eating and being healthy to perishing? A day? A week?

Any new fish, plant, invert introduced lately?

With the presented info anyone would likely be stumped. More info, photos, etc. could help up help you. You might want to refresh your memory on the Read before posting Health questions stickie thread in the Diseases forum.
 
I use a dip stick, not the best I know. But in testing the water here, it hasn't come up different than the really expensive kits I've had. Water change with gravel vac one to two times per week, or if nitrates are anything readable. It's got a marineland hob filter, and an air stone. Temp is sitting at 76, which could possibly be the issue. Temp and ph don't change. Time from eating to dead is hours. Added some neon tetras. No sign of illness and then they're dead.
 
Time from eating to dead is hours!?

Could it be the feed? I've read say of bad, rotten batches of bloodworm before.

Things that can kill that fast are oxygen deprivation / asphyxiation and poisoning, barring physical murder. Anything else kills that fast?
 
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