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Thread: Sick Koi

  1. #1

    Sick Koi

    One of my Koi looks like it’s dying. See photos. Established pond (7 years). Approx 4K lt. 5 Koi 2 Goldfish. Pressurised filter working well. Clear water. No new fish for past 2 years. All fish feeding well and schooling normally yesterday evening.

    The Koi in question is about 5 years old. It’s always had a tendency to Koi Pox

    This morning floating upside down. Swam off when disturbed but after 1 hour floating on its back again. Listless and easy to remove by hand. Currently in rather too small plastic storage box.

    Noticed swelling around and dilation of vent.

    Looks like it’s dying. I’d b interested to know what might be going on IMG_3417.JPGIMG_3419.JPGIMG_3416.JPGand if infectious. I have some clove oil if needs euthanasia (but never used it)


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  2. #2
    Senior Member Rank = Sansai richythepom's Avatar
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    Scales look raised - could be dropsy?

  3. #3
    Looking at your pond, I'd suggest that temperatures, lack of aeration and minimal filtration may be your problem, and you may be experiencing water quality issues. clear water is not always healthy water

    You need water parameters ASAFP. Temp, PH, Ammonia, nitrates, Nitrites KH and GH.

    *IF* that were my koi, I'd have put it to sleep at this point. Sorry.

  4. #4
    Quote Originally Posted by Mitsufishi View Post
    Looking at your pond, I'd suggest that temperatures, lack of aeration and minimal filtration may be your problem, and you may be experiencing water quality issues. clear water is not always healthy water

    You need water parameters ASAFP. Temp, PH, Ammonia, nitrates, Nitrites KH and GH.

    *IF* that were my koi, I'd have put it to sleep at this point. Sorry.

    Yes,4000litres is a bit too small for Koi in these temperatures,i agree with Yonsai.Firstly,dump the pressure filter,not suitable for Koi,Big airpump & stone in there & would suggest building a bigger pond of at least 2000 gallons & at least 4 feet deep to really make Koi comfortable.Pressure filters promise a lot,deliver very little except a pain in the backside.

    Ray.

  5. #5
    Thank you so much for responding. The water temp is 22c. Ph 8.5. Ammonia 0.1. Nitrite 0, Nitrate 0. I do keep an Oase Swim Skim 25 and the fountain (separate pump) running 24/7 in the hot weather to try to keep O2 up. I’ve already done the deed with clove oil which did the job.

    John


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  6. #6
    Thanks Ray

    I’ll get an air pump and stone. I’ll stick with the filter for a while as quite new. It’s a bioforce revolution 14000 (supposed to be ok for 14000 L pond with fish, but perhaps not Koi?) it’s got a 8000 L/hr pump. I make sure I keep the pump clear regularly and change UV annually. I like the filter as very easy to clean.

    Bigger pond would be fun! This is a steep but intriguing learning curve!

    I’m reassured that the other (some larger) Koi are behaving normally so hope this was a one off.

    John


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  8. #7
    Senior Member Rank = Supreme Champion RS2OOO's Avatar
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    Sorry that you had to euthanize one of your Koi.

    I personally don't think the Koi in question looked dropsied although difficult to tell from that angle. The Scales around the affected area were certainly raised.

    It would be interesting to know whether someone could diagnose as I wouldn't have a clue what to do if one of mine showed symptoms like that.

  9. #8
    One of the problems with pressure filters is that you don`t know if the foams have collapsed,they also specify a 5000lph pump,8000lph may be a little fast escpecially as the foams will clog with green algae clumps very quickly in these temps & sunlight.I ran a big Oase pressure filter on a 2,500 gallon pond & got very good at taking it to pieces nearly every day to clean the foams.When i upgraded to an Ezypod air,i couldn`t give the Oase away.That got upgraded to a Nexus 220 & finally,a couple of months ago to an Oase Profidrum,the fish & i have never looked back.


    Ray.

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