3 fish dead in 48 hours?! Help!

bokchoybug

New member
Picked up 2 paired firefish and a yellow watchman goby from the LFS. Woke up the first morning and one firefish was dead. No indications whatsoever behaviorally or aesthetically that it was going to die.

Watched the other two fish closely. 2nd morning, the goby was dead. Again, no indication (behaviorally or aesthetically) that it was going sick, although when we took him out of the tank, his face was extremely bloated, his neck area was red and a piece of flesh was stripped from his mouth. How did that all happen in just the time that we slept?!

The final fish did finally show some signs. He was discolored with a filmy, spotty, whitish, ragged look. Immediately after the goby died, we gave it a freshwater dip, then a paraguard bath, then another freshwater dip and finally into a formalin & malachite green hospital tank. It was supposed to be in there for 6 days but it died within a few hours.

I've been trying to research the issue but I can't determine what this could have been. It didn't look like Brooklynella. What could kill 3 fish in a matter of 48 hours? Is there somehow we could test our water for bacteria or something?

Added Seachem Stability and Probiotic to the tank. Did an open bag acclimation for 1.5 hours until the water was about 60% tank water and 40% LFS water.

Temp 79
Salinity 1.024
Ph 8
Ammonia 0
Nitrite 0
Nitrate <10
 
Yes, it's ro/di.

Just to clarify, the tank I'm referring to in my post is my QT. Weekly water changes from my DT (which has 2 clowns, several shrimp and a number of inverts with some corals -- all thriving) go into the QT to keep the parameters as close as possible. So, those three fish were the only fish in the QT tank and it was heart wrenching to see them dead/dying one by one.
 
its tuff to watch fish suffer the good thing is you have them in a qt tank, it sounds like a disease got the best of them, like brooknella (SP) that kills fast
 
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