Hi all,
Recently, we have experienced a heavy mortality in our fish tanks. More specifically, we observed 6-7 dead fish in a single tank per day. It's reduced now to 1-2 fish a tank per day but we still get 7-8 dead fish in total per day otherwise in normal situation we used to get 3 dead fish per week. The fish look absolutely fine. We have carried out certain tests for water quality but everything seems to be fine so far. We have experienced this suddenly. I was wondering if any of you working on zebrafish and having a fish facility not older that 4 years or so observed such mortality and what precautions have you taken to reduce it? Another important point is we have two rooms and both the rooms have the same water supply. Fish in one room died while in the other things are absolutely under control.
Thank you.
According to your description, I think water was not contaminated by pathogens. So in the room of death fishes, everything are ok?
Check this link
https://www.quora.com/What-are-the-leading-causes-of-death-in-aquarium-fish
regards
this link is useful
https://www.advancedaquarist.com/2009/12/fish2
regards
Thanks a lot for your answers. We don't about the pathogen load in these tanks. We are checking now. We checked water quality in term of nitrites, phosphates etc.
Please check the tanks also, I have experienced such mortality in my FRP tanks. The few FRP tanks was leaked and water were continuously leached, so I putted plastic polyethylene on the FRP tanks to stop leaching, soon I observed fishes were dying everyday. Initially I did not get but finally I got the point.
Pl check pH of the fish tank water. We had also noticed heavy mortality in all age groups in Pune Facility. After ruling out role of all the etiological agents,it was pH of the water. The pH was reduced to 3.5, which was corrected and immediately stopped the mortality.
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