Overnight death - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 14 Old 10-17-2008, 04:03 AM Thread Starter
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Overnight death

Ok I have a hundred gallon setup for tetras and other community fish. During the day the fish are active and healthy, but at night I tend to find 1 or more swimming perilously in the tank. I also have a relitively large pleco about 8 or 9" in the tank. I was wondering if he could be the culprit. I figured most of the tetras go domn to the bottom and enter a sleep like state and the pleco is just getting started. Could he be stumbling across these tetras and damaging them. Some disapear and some I find in the tank dead?


Thanks for your Time,
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post #2 of 14 Old 10-17-2008, 04:19 AM
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there appears to be a virus that some tetras such as neons are prone to. It is said that it is untreatable and can be transmitted to some community fish. The cardinal tetras do not appear to be affected by this virus sometimes called neon tetra disease. If the tetras you speak of are not neons then much more info would be needed . See the notice at top of freshwater emergencies and disease section.

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Last edited by 1077; 10-17-2008 at 04:21 AM. Reason: spelling.
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post #3 of 14 Old 10-17-2008, 04:35 AM Thread Starter
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neons, glowlights, silver tipped, pristellas ect. only occurs at night. temps and ph are good, water chemistry is pristene.
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post #4 of 14 Old 10-17-2008, 05:29 AM
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Can you tell us exactly how many of each species of fish you have? What is your water change routine, how much do you feed, and what exactly are your readings for ammonia, nitrite and nitrate?

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post #5 of 14 Old 10-17-2008, 02:24 PM Thread Starter
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I don't buy any less then 7 of each, my purpose in setting up a hundred gallon wasa to do this. Ive been at this for about 12 years just never had this problem before.
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post #6 of 14 Old 10-17-2008, 03:19 PM
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Question

are all of the different types of tetras being affected?

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post #7 of 14 Old 10-17-2008, 03:40 PM Thread Starter
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Yeah and it seems to only be happening after the lights go out, there isn't any severe temperature drop. It isn't the sudden shutoff of the lights either.
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post #8 of 14 Old 10-17-2008, 08:23 PM Thread Starter
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Ok new data. I am ruling out pleco. I have discovered two tetras today finally get a look at what is going on. A neon and a glowlight seem to have something growing on or near there head. The neon has a sort of white substance growing behind it's head it kind of looks like a scar. Its head looks a little swollen as well. The glowlight has something on top of its head that kind of looks like a mohawk. I noticed that they will stay stationary because if they start swimming they lose control! Any ideas? If so what should I treet it with? This is very frustrating.


Thank you
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post #9 of 14 Old 10-17-2008, 08:31 PM
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What kind of pleco is he? Most are vegetarians, and unless he is not being fed well enough, the larger varietys will feed on fish's slime coat.
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post #10 of 14 Old 10-17-2008, 08:58 PM Thread Starter
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it is a butterfly pleco the average, at every pet store. Im ruling him out cus of my last post. I found some other evidence leaning away from pleco.
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