Burgessi cory dropping like flies

[Stephen]

Update:

Sadly the new Corydoras (Corydoras burgessi) are dropping like flies, I think I only have 8 left out of the 15.
I will telephone Aqualife Leyland tomorrow (Wednesday) as this is unusual, must be some weak fish. I've only had them for 4 weeks (26th October).
All the other fish are fine.

[Staffylover]

Really sorry to hear this Stephen, it's so frustrating and disheartening when this happens, I hope you get some help from Aqualife especially since a large group of Cory is never cheap, I also tend to get as big a group as I can manage as the fish prefer it and most shops are far away from me, but I do worry about this risk, hopefully Aqualife will sort something out.

[Gingerlove05]

Sorry for your losses Stephen
Hope you get something sorted

[fr499y]

Sorry to hear @Stephen Hopefully you get it sorted.

[Martinspuddle]

Sorry to hear this @Stephen, do you know if they were wild caught, if so have thought about trying to use some Catappa leaves?

[PaulVerrall]

Sorry for your losses mate

[fr499y]

Damn that’s a lot to loose!

[Stephen]

Damn that’s a lot to loose!

I don't believe it's my fault.
I'm fussy about my aquariums, regular water changes, syphon the sand regularly and clean the filters on rotation.
All other fish are fine including my Corydoras duplicareus.
All parameters are where they should be.

[Martinspuddle]

@Stephen, has any of the decease fish got red spots on the belly?

[Stephen]

@Stephen, has any of the decease fish got red spots on the belly?

Not that I've noticed, they look like they have just dropped dead.
The remaining two are feeding normal.

Although I had only done a water change on Tuesday this week I will remove the wood and give the sand another syphon tomorrow just in case there might be a body that I've missed.
If Aqualife don't replace them then I'll get some Corydoras melini instead from my favourite LFS, they have some coming in next week from Colombia.
If Aqualife offer to replace them then I'll ask for Corydoras melini instead as I don't think the Corydoras burgessi are currently coming from a good source, they are tank bred.