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  • Results 1 to 13 of 13

    Thread: Zombie Koi

    1. #1
      Kiely is offline Junior Member
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      Zombie Koi

      Hello,

      I would greatly appreciate an insight to what my koi may have. I live in SoCal, and had baby koi that we transferred into our big pond. I noticed the koi started dying after all that rainfall we had in March. They all ended up dying. So afterwards, we cleaned the pond what I thought was pretty thorough to get rid of whatever disease and set it up so we can have more koi.

      This week we noticed one of the new koi started isolating itself. Few days later, it’s looking like a zombie fish. None of the other fish seem to be sick or catching what this one has, but I’m afraid it will only be a matter of time before all of them are infected. Is there any remedy to save my koi??

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    2. #2
      cindy's Avatar
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      Sounds like the rain caused a ph crash. Do you have test kits? Get a kh test kit also. Important to
      Add baking soda after checking for no ammonia or binding ammonia to keep ph and kh stable. Rain is acidic and drops ph. Adding baking soda keeps the kh or total alkalinity stable. Also
      10 % water changes weekly with a binder keeps fish healthy.

    3. #3
      Kiely is offline Junior Member
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      After all of the baby koi died, we drained the pond (50%), cleaned it and refilled. My husband is the one who does the test kit for pH, ammonia, nitrates, etc. I’ll send that info when he gets home from work.
      Last edited by Kiely; 06-30-2023 at 12:33 PM.

    4. #4
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    5. #5
      Kiely is offline Junior Member
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    6. #6
      fly4koi is offline Senior Member
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      Please provide water quality parameter, it is always the first thing to check. Also, add baking soda when it rains a lot, actually you should add some now, 1lb per day per 1000 gal of water.
      Get Seachem Prime binder to keep ammonia and nitrite from poisoning your fish, if you had a pH crash, until the cycle recovers (6-8 weeks).
      Last edited by fly4koi; 06-30-2023 at 04:37 PM.

    7. #7
      Kiely is offline Junior Member
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      Everything right now. Husband did a 20% water change yesterday. He said he added the salt a while ago. He add beneficial microbes too.

      pH 8.2
      Temp 27 C
      Nitrite 0.25
      Ammonia 0
      Phos 0.25
      kH 107.4 ppm
      Salinity 2.2 ppt

    8. #8
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      How many gallons?

      I’m math challenged. Had to look up the 2.2 ppt. I always use a percent. “What is the ideal salt concentration for the pond? It is recommended to maintain the salt concentration in the range of about 0.13% to 0.25% (1.3 to 2.5 ppt) in the pond.”

      0.25% for nitrites
      Last edited by cindy; 06-30-2023 at 09:13 PM.

    9. #9
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    10. #10
      Kiely is offline Junior Member
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      Our pond is 2500 gal.
      No worries, I’m still learning myself.

      I was thinking it was columaris because of the fin rot and mouth rot, and white rags look based off of kodama’s website. But my hubby doesn’t think so because of the beneficial bacteria that eats gram neg bacteria’s food. Columnaris is gram negative and would compete with beneficial bacteria.

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    11. #11
      fly4koi is offline Senior Member
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      The fact that you have nitrite is a sign of a possible pH crash that happened recently.

    12. #12
      Kiely is offline Junior Member
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      I don’t think you guys read the part that the rainfall happened back in March. The pond was empty for maybe a month. Then we prepped it for a brand new set of koi.
      We haven’t had rain recently..

      My husband said it can’t be a pH crash because the kH is ok

    13. #13
      fly4koi is offline Senior Member
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      Both ammonia and nitrite level should be 0, though, if the nitrification cycle is at a stable state.

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