Please help our corydoras - we are finding them dead with reddy brown gill marks!
Tropical Fish

Tropical Fish Keeping - Aquarium fish care and resources » Freshwater Fish and Aquariums » Tropical Fish Diseases » Please help our corydoras - we are finding them dead with reddy brown gill marks!

Please help our corydoras - we are finding them dead with reddy brown gill marks!

This is a discussion on Please help our corydoras - we are finding them dead with reddy brown gill marks! within the Tropical Fish Diseases forums, part of the Freshwater Fish and Aquariums category; --> Firstly many thanks for reading this! We have a small tank including 4 blood-fin tetras, 3 cherry barbs, 3 peppered corydoras and 3 albino ...

Check out these freshwater fish profiles
Three Line Cory
Three Line Cory
Reticulated Cory
Reticulated Cory
Reply
LinkBack Thread Tools vBmenu Seperating Image Search this Thread vBmenu Seperating Image
Please help our corydoras - we are finding them dead with reddy brown gill marks!
Old 11-05-2009, 05:30 PM   #1
 
Unhappy Please help our corydoras - we are finding them dead with reddy brown gill marks!

Firstly many thanks for reading this!

We have a small tank including 4 blood-fin tetras, 3 cherry barbs, 3 peppered corydoras and 3 albino corydoras.
Well we did... The blood-fins came first, then the peppered corydoras, then the cherries and the albinos arrived at together. Things were fine for a 2-3 weeks days, then one by one the albino corys died. The first one we found wedged under the aerator, when we removed him he had reddening under the gills. The next one was dead on its side with browny red marks around the gills and we think the third one was similar.
Now one of the peppered corys is gone too - found hanging limp in a plant - we got him out of the plant, he was still alive for a bit, then we later found him on his side with the red around the gills too.

All other fish, including the other two pepper corys seem fine.

There is melafix in the water at present.

Tank size: 35L
pH: 7
ammonia: 0
nitrite: 0
tank temp: 26

The tank has been up and running since June - we had a bit of a fiasco with a few neon and cardinal tetras to star with before we moved on to the others. We lost a blood fin under the filter a couple of months ago, but all been fine apart from that. The filter is running, we have a working aerator, some living plants. The tank has a fair bit of algae, which we clean once a week and we do a 10-20% water change with bottled water once a week.

There are one or two tank ornaments and the substrate is fine gravel. (2mm or so in diameter)

Any assistance would be much appreciated as we don't want to lose anymore fish!!

Thanks.
fishomat is offline   Reply With Quote
Old 11-05-2009, 05:45 PM   #2
 
teddyzaper's Avatar
 
well first we need your water hardness, alkalinity, nitrate levels, because some cories are sensitive to those.
i would take out the areator because it is bad for the plants and reduce the amount of time the light is on to reduce algea.
teddyzaper is offline   Reply With Quote
Old 11-05-2009, 05:49 PM   #3
 
It would also be fair to say that your tank itself if slightly overstocked. However I dont know whats killing your fish.
Rohland is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Breeding Corydoras Paleatus (Peppered Corydoras) Spanishearl Fish Breeding 1 02-04-2010 07:20 AM
corydoras hastatus vs corydoras pygmaeus Falina Catfish 10 09-14-2007 10:36 PM
brown water within an hour...dead fishes!! mattyphilly Tropical Fish Diseases 2 07-14-2007 03:03 AM
Water turns brown and cloudy suddenly!One fish dead! mattyphilly Tropical Fish Diseases 2 07-13-2007 05:35 PM


Tags
corydoras, marks, red

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -5. The time now is 05:42 AM.