Danio died, one more seems to be gasping.
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Danio died, one more seems to be gasping.

This is a discussion on Danio died, one more seems to be gasping. within the Tropical Fish Diseases forums, part of the Freshwater Fish and Aquariums category; --> Hi, I recently moved my 5 danios to my 90gal to help cycle it. They were happy and normal. Today I did a large ...

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Danio died, one more seems to be gasping.
Old 10-21-2006, 10:26 PM   #1
 
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Danio died, one more seems to be gasping.

Hi, I recently moved my 5 danios to my 90gal to help cycle it. They were happy and normal. Today I did a large water change and noticed afterward that they were not swimming all over like they normally do. We went out to get a movie and when we came back one was dead :(. He looked healthy, no sign of disease. Now I am worried because there is one other one who is swimming around the top of the tank, slowly. The other three seem to be ok. Levels are currently:

PH: 7
KH: 4
A: 0
NO2: 0

Before I did the water change the PH was around 6.4. Could this PH spike have caused the fish to die? If so, what do I do now and how do I prevent this in the future? I think this other one will die soon, he does not look good.

Thanks.
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Old 10-21-2006, 10:53 PM   #2
 
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the quick change could have and the other thing that comes to mind is not enough oxygen. fish swimming at the surface gasping is usually a good sign of low oxygen levels. do you have a good air pump and air stone/pipe?
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Old 10-21-2006, 10:57 PM   #3
 
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No air pump but the output of my canister filter is above the water level so it agitates the water.
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Old 10-22-2006, 01:07 AM   #4
 
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So far so good. So how am I supposed to do water changes to avoid this in the future?
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Old 10-22-2006, 04:25 AM   #5
 
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I would perhaps stick to small but frequent water changes at the moment to prevent large fluctuations in the parameters.

Hope the fish are ok :)
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Old 10-22-2006, 10:13 AM   #6
 
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The remaining 4 are OK this morning. Weird thing is that the one who died was really pale and small before I moved them to the 90gal. Once I did his stripes came out and he looked great....then he died. So my guess is that he was weak to begin with....
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Old 10-22-2006, 11:07 AM   #7
 
Sorry to hear about that jsm, best of luck to the remaining danios.
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Old 10-22-2006, 12:36 PM   #8
 
Sorry to hear about the loss of the fish. How large of a water change did you do? Do you add dechlorinator to the water?

I know the water from tap contains CO2. As it sits, the CO2 is degassed, which will cause a change in pH. That small of a pH shift should not be a problem for the fish.
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Old 10-22-2006, 04:16 PM   #9
 
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sorry to hear that
i hate it when fish die
it's like losing a piece of yourself
hope the other fish go well
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