Why are my crabs dying?

Discussion in 'New To The Hobby' started by brew0688, Apr 13, 2010.

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  1. brew0688

    brew0688 Fire Shrimp

    Joined:
    Feb 25, 2010
    Messages:
    313
    Location:
    Florida
    Hi everyone.

    I don't understand why, but it seems as though my crabs aren't surviving my 3 month old tank.

    I have had 3 crabs die in the past 4 days.

    I know copper is the first red flag, but i have poly filter installed, so it can't be that.

    Calcium is at 440ish? I'll check it again in a few to make absolutely sure.

    Nitrites 0
    Nitrates are a little high, maybe 20
    Ammonia 0
    pH 8.3
    Salinity is 1.024
    temp 79

    Tons of algae to eat, and I feed the fish once a day, so they have plenty to eat.

    My snails are thriving and eating more than ever.
    I had an emerald crab looking awesome, then dead the next day. No slow deterioration or decrease in activity.

    Any ideas?
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  3. blackraven1425

    blackraven1425 Giant Squid

    Joined:
    Mar 1, 2010
    Messages:
    4,780
    I wish I had your problem of only crabs mysteriously dying off.

    Are you sure they're not just molting, and you're thinking the molt is the crab? It's happened to me a whole lot; my big hermit molted, and it looked like a whole body, but I saw it walking around 3 days later.
  4. IamRit

    IamRit Astrea Snail

    Joined:
    Apr 4, 2009
    Messages:
    41
    Location:
    Atlanta, GA
    Hmmm that's weird. Are you sure that they are not molting. Did you checked the crab to see if there are any damage of some sort?
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  5. Sarrixx

    Sarrixx Bristle Worm

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    Feb 8, 2010
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    Location:
    Chidlow, Western Australia
    +1 probably just molting
  6. brew0688

    brew0688 Fire Shrimp

    Joined:
    Feb 25, 2010
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    Location:
    Florida
    Ok - so one of them was molting.

    BUT

    Two of them are dead. One was an emerald crab, and he pretty much disintigrated when i picked him up (and it wasn't a molt. he's dead for sure.)

    The other one was a hermit, and he is definitely dead.

    I'm not sure what to think.
  7. Reef2Keep

    Reef2Keep Purple Spiny Lobster

    Joined:
    Nov 8, 2009
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    460
    Location:
    Dana Point, CA
    stray voltage? do you have a grounding probe?
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  9. brew0688

    brew0688 Fire Shrimp

    Joined:
    Feb 25, 2010
    Messages:
    313
    Location:
    Florida
    I'll look into it, but I highly doubt it. Everything in this tank is less than 4 months old.

    Can I just grab a multimeter from my dad's shop?
  10. tigermike74

    tigermike74 Panda Puffer

    Joined:
    Sep 24, 2008
    Messages:
    2,114
    Location:
    Southern CA
    Yup, just ground one lead and stick the other in the water. Check for both AC and DC voltage.