ID cause of death?
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Old 05-02-2013, 09:19 PM   #1
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ID cause of death?

First time I see a dead shrimp like this and this is not the first one. Seems like the front part of the body is intacted and rear part is gone or eaten. And there's a dark coloration on the cheek of the shrimp...

I've been getting random deaths like this in the past two weeks, one death every 2 or 3 days.

Water parameters:
Temp: 70F
GH: 5
KH: 1
Nitrate: 5
Nitrite: 0
Ammonia: 0

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Old 05-02-2013, 10:24 PM   #2
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the cause i have no clue but the reason it looks like that is cause it was eaten part way
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Old 05-03-2013, 12:07 AM   #3
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Sorry to hijack your thread, but if that a fissidens carpet?
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Old 05-03-2013, 12:35 AM   #4
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it almost looks as it if was burned as that part of the shell is eroded away.

I have seen this before and suspected nitrates seeping from the substrate. Depending on how old the tank is, there may be a fair amount of toxicity built up.
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Old 05-03-2013, 12:39 AM   #5
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- TDS?
- pH?
- Tap or RO water?
- Are they breeding?
- Are they active?
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Old 05-03-2013, 01:41 AM   #6
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Good chance your nitrate test is under reporting and your nitrate levels are killing them, these are just eaten on the back end because the shell is easier to get through under the belly for others to eat, then they eat up into the head as they can reach.

Either get a new nitrate test, or take nitrate test bottle number TWO and bang it and mix it for about 5 minutes, then retest, see if the number goes up. The solution in bottle number TWO tends to crystallize and go out of solution, rendering the test results too low. That all the other numbers look fine, and that you have a SLIGHT nitrate level, and the odd death, consistently, suggests nitrates might be the cause.

If you're using API nitrate test and the tube turns orange or above (anything past dark yellow), it's the nitrates.

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Old 05-03-2013, 01:56 AM   #7
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Perhaps old age?


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