Help Question? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 8 Old 09-04-2008, 09:10 PM Thread Starter
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Help Question?

I have a 29 gallon tank that was overstocked. So I sold some fish to someone on craigslist. I have never had a problem with any sick fish.
Well i get an email this morning saying that he put the fish in with his and now ALL the fish are dead. The person said there was a white film over the fish. Does anyone know what would have happen??
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post #2 of 8 Old 09-05-2008, 03:12 AM
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Without knowing whether the person you sold fish to acclimated them properly, what the water parameters were in their tank, Whether they added the fish to already overstocked tank, How long before the fish died ,It is near impossible to say what happened. If I had to guess , and that's all I would be doing , I would lean towards ammonia poisoning. There are few diseases that kill across species and all at once If that is indeed what happened. By adding too many fish all at once it could have caused an ammonia spike that left undetected would produce the results you described. Also another reason why most folks quarantine new fish before putting them in the community aquarium.

The most important medication in your fish medicine cabinet is.. Clean water.
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post #3 of 8 Old 09-05-2008, 03:37 PM
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How many fish did you give him? I'm guessing his tank couldn't handle the additional bioload and he had an ammonia spike...but that's just my guess.
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post #4 of 8 Old 09-05-2008, 06:21 PM Thread Starter
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I gave him 4 guppies, 2 sailfin mollies, 2 x-ray cats, 2 tigar barbs and a cherry barb
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post #5 of 8 Old 09-05-2008, 06:23 PM
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Hmm, and what size tank were these going into? Do you know what kind of filter he had? I mean, that's a WHOLE lot of fish to be adding to a single tank at one time unless it was quite a large tank with good filtration.
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post #6 of 8 Old 09-06-2008, 10:06 PM Thread Starter
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they were going into a 20 gallon tank that already had fish in it. He said he was letting another tank get to room temp before he switch them over to it. btw the other one that he was letting get to room temp was a 10 gallon .
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post #7 of 8 Old 09-07-2008, 12:23 AM
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Both ways, that's a huge amount of fish to add to either tank. Sounds like he didn't realize what he was doing and caused an ammonia spike. I certainly wouldn't say it was any illness your fish brought the tank.
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post #8 of 8 Old 09-09-2008, 07:33 PM Thread Starter
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Thanks... that makes me feel better becuase i have never had a problem with sick fish before.
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