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Thread: Why are my yamatos dead?

  1. #1
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    Why are my yamatos dead?

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    Saw them swim at the surface of water trying to jump out yesterday morning
    Then found them dead when i reach home at night.
    Ph was ~6.5
    KH was 4
    temp:28
    Is too much co2 the cause??

  2. #2
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    I use to have that problem, i solve it by adding an air pump after the lights and Co2 are cut. Dunno if this helps, but just what I did. Now I hardly see any corpse lying around.

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    It seem that overdose of CO2 is common problem, just like overfeeding.

    Why not get a co2 indicator. They are put inside the tank and you can watch it regularly. The one I use is from Sera. One bottle last me many years because I seldom change the chemical inside the indicator.

    Come to think of it, I wonder whether they got expiry date.

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    kc , how much is one of those indicator ?
    here fishy fish fishy . here shirmpy shirmpy here is my noobie tank(3wk)

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    What's your tank size, fishload and how well planted is your tank (assuming it's a plated tank)?

    With high fishload, CO2 is produced during non lighting period thus CO2 poisoning? Also with high fishload, tendency for NO3 poisoning exist. Maybe you can consult a tester on this.
    Cheers!!

    Sherwin Choo
    [email protected]

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    Forgotten already. Almost 3 years you know, I think around $18.

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    I know why already.
    Just realised that when lights are off at night, the fishes are fighting with the plants for oxygen.
    So every morning they are short of oxygen, saw them swimming on the surface this morning.
    And somemore i didn't off the CO2
    Wonder anyone has solution to solve this problem?

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    I would be more suspicious of possible copper contamination. A day or two before the shrimp died, did you happen to add any new plants to your tank? New plants purchased from a store (not from another hobbyist)? I lost three cherry shrimp and two Yamatos two days after I added an emerse-grown Lobelia cardinalis to my tank. I think maybe there was insecticide residue on the plant, but cannot be sure. Only one Yamato shrimp survived. It was a very expensive loss, since I paid $13(USD) for the three cherry shrimp and $10 for three Yamatos. I bought three more cherry shrimp and put them in a different tank. They're fine.

    I don't think CO2 is the problem (given your KH and pH), although anything is possible...

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    Domzz, get a water pump wif water aeration capability. I'm using a small one 2 aerate my tank during lights off.
    If you've learnt, teach, if you have, give.
    Don't walk behind me as I might not lead, don't walk in front of me as I might not follow. Walk beside me, as my friend.
    Mohamad Rohaizal is my name. If it's too hard, use BFG. I don't mind.

  10. #10
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    Are you using DIY CO2 or what?

    I'm using Tank CO2 and I don't have a timmer for it. So I need to fine tune until I got it right. No need for me to add a air pump at night. Can be very troublesome, I think. And what will happen if you forgot?

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    ----------------
    On 1/29/2003 10:21:11 AM

    Saw them swim at the surface of water trying to jump out yesterday morning
    Then found them dead when i reach home at night.
    Ph was ~6.5
    KH was 4
    temp:28
    Is too much co2 the cause??



    ----------------
    ashes to ashes, dust to dust.......

    sounds like CO2 poisoning to me.....
    Cheers and Regards,
    Billy Cheong

    I'm not always dumb,
    Just most of the time...

  12. #12
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    If the shrimps happen to be going near the surface during the lights "on" period, the chances are it might be CO2 overdose. But if it happens during the morning before lights "on" period, the chances are it is lack of O2. The last possible cause is either high ammonia, nitrite or nitrate.
    Plant Physiology by Taiz and Zeiger

  13. #13
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    Use a timer for the air pump or water pump like mine. I connect my Alife water pump 2 a timer. Hassle free. Won't forget.
    If you've learnt, teach, if you have, give.
    Don't walk behind me as I might not lead, don't walk in front of me as I might not follow. Walk beside me, as my friend.
    Mohamad Rohaizal is my name. If it's too hard, use BFG. I don't mind.

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    On 1/30/2003 8:57:08 PM

    Use a timer for the air pump or water pump like mine. I connect my Alife water pump 2 a timer. Hassle free. Won't forget.
    ----------------
    How much does the timer cost?
    Can it be use for lights too?

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    you can find timer in nearly all LFS. Saw one in NA selling at $28 I think... (can't remember)
    Cheers and Regards,
    Billy Cheong

    I'm not always dumb,
    Just most of the time...

  16. #16
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    timer can get at $18 from Mr Chan at NA ... quite good and solid built
    ... always look at the bright side of life

  17. #17
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    I take back what I said. I checked the pH/KH/CO2 chart, and it is possible that your shrimp succumbed to CO2 poisoning. With KH of 4.0, you don't want your pH to go below 6.6. This would correspond to CO2 of 30 ppm, the maximum that you don't want to exceed. I think shrimp may be particularly sensitive to this (and to low pH). However, I don't think turning off the CO2 at night is a good idea. Using an air pump at night (with CO2 turned off) is an even worse idea. The pH swing would be far greater than the relatively small dip from keeping the CO2 going. Maybe raise the KH a little bit and maintain a slightly higher pH. For example, KH of 5 deg and pH of 6.8. That would be ideal. If your pH drops to 6.7 during the night, you're still safe. It's just an idea.

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