Mysterious Fish Deaths (Help!)

[TheBettaKeeper]

So on Friday I went to my LFS to pick up 5 rummynose tetras for my 29-gallon, which at the time was stocked with 6 agazizzi corys, 6 harlequin rasboras, and one juvie angel. Everything seemed fine on Saturday, but when I woke up on Sunday, I found one rummynose dead. I figured it might have died from stress, so I removed it, but just to be sure I tested the water and got 0 ammonia and 0 nitrites. On Monday, another dead rummynose. I was getting a little suspicious now, but I tested the water again and got the same results as before. But on Tuesday, I found one of the cories dead. I've had these 6 for like 4 months, and he seemed perfectly fine the day before, in fact so did the rummynose before their unfortunate demise. Then today, another dead cory, and a third cory is showing a red splotch right where all the other cories had one when I found them dead. I honestly don't really know what's wrong, my parameters seem fine, and until i noticed the third cory with the red splotch, the fish were acting normal right up until I found them dead. Yes, I will provide additional details if you ask, and any help would be greatly appreciated. I have attatched a photo of the third cory.

 

[Fishfur]

So on Friday I went to my LFS to pick up 5 rummynose tetras for my 29-gallon, which at the time was stocked with 6 agazizzi corys, 6 harlequin rasboras, and one juvie angel. Everything seemed fine on Saturday, but when I woke up on Sunday, I found one rummynose dead. I figured it might have died from stress, so I removed it, but just to be sure I tested the water and got 0 ammonia and 0 nitrites. On Monday, another dead rummynose. I was getting a little suspicious now, but I tested the water again and got the same results as before. But on Tuesday, I found one of the cories dead.

I take it that you did not QT the new tetras?

That’s unfortunate- if the tetras were carrying some sort of infection, chances are it’s been passed to the corycats.

I am very sorry that’s happened but it is a good example of why practicing QT for new livestock is important & shouldn’t be skipped.

At this point I suspect it’s much too late to do anything useful except plenty of water changes & wait to see if any of them survive this.

Even if you can get antibiotics, it’s almost certainly too late for them to be helpful.

This is a hard way to learn that QT it’s important.

 

[TheBettaKeeper]

I take it that you did not QT the new tetras?

That’s unfortunate- if the tetras were carrying some sort of infection, chances are it’s been passed to the corycats.

I am very sorry that’s happened but it is a good example of why practicing QT for new livestock is important & shouldn’t be skipped.

At this point I suspect it’s much too late to do anything useful except plenty of water changes & wait to see if any of them survive this.

Even if you can get antibiotics, it’s almost certainly too late for them to be helpful.

This is a hard way to learn that QT it’s important.

Yeah, I normally would but I didn't feel a need to because I've purchases many fish from this store before and have never had an issue. Lesson learned, I guess. I really appreciate the response, hopefully some of the fish will make it through.

 

[Fishfur]

Yeah, I normally would but I didn't feel a need to because I've purchases many fish from this store before and have never had an issue. Lesson learned, I guess. I really appreciate the response, hopefully some of the fish will make it through.

I sincerely hope some make it too. I get trusting the store, but it never Kurt’s to bear in mind that they’re pretty much at the mercy of their suppliers as we hobby are.

Stores can run into nasty surprises too through no fault of their own or really anyone else’s. The fish may have been just starting to become sick on the farm but since they hide illness so well, nobody would be the wiser until something obvious happens, which might not be for days or weeks and sometimes for months.

 

[Caliban]

I just had a similar experience… trusted store gave me Ich and I didn’t QT for long enough… more fish have it than before and some perfectly healthy ones died from it… the importance of quarantining fish is very relevant whenever you get a infection that could have been solved or stopped.