Tropical Fish Keeping - Aquarium fish care and resources

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kafkabeetle 07-11-2010 12:01 PM

Neon tetra mysteriously dies
Aquarium info:
29 gallons cycled for 8 months
Aquaclear 50 filter running on full power

Melon sword
Purple dwarf lily
Unidentified sword-type plant

(now) 8 neon tetras
11 harlequin rasbora
5 otocinclus
2 platy
2 dwarf gourami

Water parameters:
Ammonia - 0
Nitrite - 0
Nitrate - 20

Friday I came home from work to find one of the neons dead and stuck to the filer intake. In the past several months I've noticed that 2 of the neons had sort of banana shaped bodies, but they were large and seemingly very healthy so I assumed if was just bad breeding (unfortunately, I purchased these neons at Mejier grocery store 7.5 months ago). My roommate says he thought the two always looked like that since I brought them home. Anyway, aside from the strange shapes, I have noticed no sympoms of disease or strange behavior in any of these fish, and it is the first death I've had since I set the thing up (aside from 1 oto the day after introduction). Ideas?

scp2 07-11-2010 11:05 PM

Its possible that the deformed bodies had something to do with the deaths. I once had mollies that bred and the 3 fry that survived were very small, never grew bigger than a tetra. Anyway, if you saw no signs of illness, no ick or scale issues, and your water levels are fine, no ammonia or nitrate/trite spikes, it's possible it was just its time to go. The fish may have been old, or as said deformed internally, bad breeding etc. if you cant find anything wrong in your tank, I would not worry about it too much, as these things tend to happen. I would however do a partial water change if you suspect something to be wrong, or if the dead fish was in the tank long, espeically since it was attached to your filter as you dont want dead fish bacteria to cycle into the tank and infect the others. Hope this helped.

james7139 07-19-2010 10:35 PM

i think scp2 is correct do a partial water change and watch the tank closely the next few days just in case but you should be fine.

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