Tank of death! Help! - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 07-22-2013, 08:04 PM Thread Starter
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Tank of death! Help!

So I have no idea what happened last night... Other than I woke up and 6 fish had died. I can't find any patterns to what died either.. My CAE, one of my hardiest fish died, while my angel who's suffering from a fungal infection lived.

Only changes made in last 24 hours: I added 4 quarter sized silver dollars. I think these are way too small to have caused a spike in ammonia, considering my already well stocked tank. The only other change is I added romaine lettuce for the silver dollars, in attempt to stop them from eating my plants.

What lived: 5x giant golden danios, 2x angels, 3x corydoras, 1x albino bristlenose pleco, 1x common pleco, 2x Raphael cats, 2x silver dollars

What died: 2x silver dollars, 1x CAE, 1x angel, 1x loach, 1 bamboo shrimp.

So finally, any idea what could have happened? My water parameters are good(other than high phosphates, but been high for 3+ weeks)
And what can I do to stop the dying? I already did a 40% water change. Any help is appreciated.
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post #2 of 9 (permalink) Old 07-22-2013, 08:23 PM
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are u running co2? do u have enough surface agitation for oxygenation?
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post #3 of 9 (permalink) Old 07-22-2013, 08:34 PM
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Please post your water paraneter readings. and tank size?
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post #4 of 9 (permalink) Old 07-22-2013, 08:59 PM Thread Starter
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I do have co2, and I think there's enough.. I have a marineland penguin 300 that creates a decent amount. They're not showing signs of hypoxia. Wouldn't they be breathing fast up by the surface?

Only tests I have:
nitrates 10-20ppm
Phosphates > 10ppm
Ph > 7.6.
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post #5 of 9 (permalink) Old 07-22-2013, 09:08 PM
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I would get a test for ammonia at least just for instances like this. You could take a water sample to a fish store near you and have them test your water. They will likely test ammonia, nitrite, and nitrate. Do you have pressurized co2? That would be another place i would make sure nothing got bumped/changed. What test kit do you have (strips or liquid)? Whats your tank size? Are you treating the infection with and meds?
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post #6 of 9 (permalink) Old 07-22-2013, 09:17 PM
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Could tell silver dollars have attacked these fish? Just a question as they are know as herbivores
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post #7 of 9 (permalink) Old 07-22-2013, 09:20 PM
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Did you wash the romaine lettuce? Could have had a pesticide on it that killed em.


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post #8 of 9 (permalink) Old 07-22-2013, 09:22 PM Thread Starter
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I use liquid tests. And I may go have an ammonia test done.

I am dosing the API anti fungal stuff. Angel is recovering well. Been dosing for 7-10 days now.

55 gallon tank.

I do have pressurized co2 but nothing has changed there in weeks.

The silver dollars seem to be peaceful with the other fish.
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post #9 of 9 (permalink) Old 07-23-2013, 12:22 AM
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I have seen ammonia spikes develop from combined factors, such as cleaning a filter, and losing beneficial bacteria, while at the same time adding fish. You won't see CO2 toxicity until you get to pretty high levels, but I suppose next to ammonia, that might be a consideration.
Good luck,
Dave
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