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Sudden Death - Any ideas
June 9, 2016
3:51 am
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Carnivora
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Forum Posts: 36
Member Since:
February 18, 2011
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pH: 7.8
Ammonia: 0
Nitrite: 0
Nitrate:0
Temperature: 78F

GH/KH: GH - high/KH-Mid to high
Test kit used: Liquid 

Tank Size:
5 gal FLuval Spec

Length of time set-up: 1 year
Filtration used: Purigen, Sponge, Filter FLoss on intake

Maintenance Schedule:
Water has been stable for many months. Regularly add water, but I do changes maybe once a month or even once every 2 months
Detailed stock list:
As of one week ago, 2 dwarf loaches, 1 dwarf croaking gourami, 1 rabbit snail ( yellow faced tylomelania snail), 2 green nerites, many, many trumpet snails, 2 amano shrimp
Recent additions to tank:
Added 3 amanos (one died shortly after introduction), 1 tylomelania snail
What fish are affected: All fish
What are the symptoms: Loaches died within a day of each other. Both were fine and then stopped eating one evening. Next day were dead.  A week later, the gourami did not eat and died the next day. The loaches did show signs of becoming thinner. The gourami was in excellent condition. Only saw one body. 

Treatment already used: NOne yet

Anyone have any idea? Inverts are fine. Water parameters are the same as they have been for about 8 months now. Fish were eating really well until the day before their deaths. Had no lost another fish for over 6 months (originally had more loaches and one more gourami). I really don't have a clue what could have caused it except possibly a parasite from the snail/shrimp introduction. The LFS I go to is the same I have gotten all plants and livestock from - they are a good store. I did start feeding more algae wafers and hikari shrimp food for the snail and shrimp after I got them. The shrimp even bred, as the female was carrying eggs for a few weeks (obviously none survived being amanos in freshwater). I really am at a loss and pretty sad as they seemed healthy and happy. I thought maybe my parameters changed, and I was being punished for not doing weekly water changes, but when I tested everything, it was the same as for many months. I would've expected my amanos to die before the fish as the species are quite hardy usually. Perhaps it is something fish specific? 

Should I let the tank go without occupant for a while? Should I get rid of the sponge filter material and get all new stuff? I would hate to get more fish and have the same happen. Any ideas??

June 10, 2016
8:00 pm
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Danny Hagediss
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May 13, 2013
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You got a picture of those recently added amano shrimp?

June 11, 2016
4:16 pm
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Carnivora
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Forum Posts: 36
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February 18, 2011
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I can take some. Is there a particular reason why? Do you think the shrimp ate the fish?

June 11, 2016
6:08 pm
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Plaamoo
Bellingham, Washington U.S.A.
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March 15, 2009
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I can't tell you what actually killed your fish, but a 5 gal tank is not nearly big enough for them. I can't believe that your nitrates are 0 in that situation. I'd try different test. No matter how good you thing your shop is, everything should be quarantined before being added.

June 16, 2016
6:40 pm
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RooLee
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January 25, 2016
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It's very difficult to tell what killed your fish. Out of my own experience I can tell that such a small tank is prone to sudden temperature changes. It will heat very quickly or (in case you don't use a heater) it will cool down in a short period of time. Did you experience any particularly hot or cold wheather?

I lost some Otocynclus once in a 8 gall tank due to sudden temperature changes in the tank. It was unheated and the dieing stopped once I started using a small heater.

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