Tank Transfer

badgers

AC Members
Sep 20, 2009
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This is an emergency.
I had a 12 gallon Eclipse system that had 2 glow tetras, a sword tail, 2 adult cory cats, and 3 baby cory cats, 1 of the babies was about the size you see in the aquarium store and the other 2 were only 6-8 weeks old.
Since my corys were breeding so much I bought a 23 gallon national geographic tank to give them more room.

I moved all the gravel and plants to the new tank, and I tested ammonia and nitrite which all came back zero. Water temperature is 76 degrees, and that is what it was in the old tank.

My problem is the sword tail is dead after 24 hrs, and one of the youngest babies died.
The other young baby is on the gravel and its gills are pumping rapidly. The 2 adult corys go to the surface to gulp air.

the only new thing that I added to the new tank is I used API tapwater conditioner with stress coat, which I though would help.

The tank was to big for me to rinse out, so I put some tap water in the new tank and I wiped it out with some paper towels. I ran the new tank empty for 24hrs to make sure the temp leveled out and that everything was working.

I just did a water change to help but I used the API again to decholrinate.

The tetras are doing well and eating, the snails are ok and the worms that lived in my gravel seem to be alive as well. The worms are all through out the gravel in the old tank. I think they were tubiflex worms that I added as live food that nothing ate. The worms loved eating the alga wafers we fed the cory cats.

any suggestions on what might be affecting the cory cats and sword tails?
I am going to do another water change in about 4 hours to try and help.
PS, I used the stock filter foam and that crappy carbon bag that comes with the kit, but I have changed that out.
 
Have you been testing for ammonia since you first moved everything over? Perhaps there are dead tubifex worms in the substrate? If the ammonia still tests zero, maybe the nitrate level in the 12 gallon was high and the fish were shocked when moving to a zero nitrate environment. I'm just throwing out possibilities.

I'd prefer rinsing out that tank rather than merely wiping down but I kinda doubt anything on the glass surface is causing your problem since other fish seem fine.
 
Get some water test results, it's either an ammonia spike/recyle or Old Tank Syndrome I think. The symptoms are accurate to it (loss of weak/not-hardy fish, gulping for air).
 
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