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  • Results 1 to 9 of 9

    Thread: Fries - Some problems - Are they common

    1. #1
      SimonW's Avatar
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      Fries - Some problems - Are they common

      Hello friends:

      Since I moved the fries into my warmed garage for about 3 months ago I have not paid so much attention to them. Half of them have been doing very well, while the other half have died mysteriously. The most usual way to die is that they became thinner and thinner, and then one day they were floating around dead.

      I have not cared to ask why. Please correct me if I am wrong, but I think that the most individual fish fries have poor genes, as no fish species need so many fries with perfect genes to survive. They produce so many fries, and it is sufficient that some pro cent of them have good genes. Nature does not give any species the luxury of many off-springs with perfect genes. Those of my fries that died must have weak genes. That is true even for H. sapiens, therefore we have so many natural miscarriages.

      The surviving fries have been doing very well in the last 1 month. Until for about 10 days ago one of the fries started to float with belly up. My intuition is that it has got constipation, because it had not been eating for some days, and its belly was swollen. I did not mind if it would die, so I just let it be and waited for its death.

      Today I realized that I had not seen it for some days. I worried that it had been dead and rotting somewhere in the aquarium, so I made a huge water change. To my surprise it is still alive, with a bent body and unbalanced way to swim. It had a nice body before.

      And I also noticed that my biggest fry which I after all somehow appreciate seems to have the same problem the above-mentioned fry had for some 10 days ago: Swollen belly, havenīt had food for 2-3 days, and much less agile as it used to be, though not yet floating with belly up.

      All other fries are just fine.

      They have been in an aquarium, and the water is from the tank I have for my bigger koi (not fresh water due to the position of the water outlet). The water is changed every 1-2 days, 50-80% each time.

      I checked the water parameters which have been similar every time I do the checking:

      Ammonia: 0, nitrite: 0.2 ppm (the water contains 0.1 % NaCl), nitrate: 40 ppm, pH: 8.0, temperature: 18 centigrade.

      The biofilter consists of a sponge filter, a lot of plastic plants and gravels on the bottom.

      When I change water I siphon out the most debris among the gravel.

      I have been feeding them with sinking pellets for sturgeon and flakes for tropic fish.

      I just wonder if someone could explain what disease the latest 2 fries have got. Thank you!

      The video shows the first fry today when I have found it:
      Last edited by SimonW; 01-27-2020 at 07:34 PM.

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    2. #2
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      That fry would appear to have a broken back, or some form of neuro damage of the spine. One of the common causes of broken backs is electricity. Are your pumps submerged pumps? Are they on Ground Fault Interrupters? Barring electrical, I can only think that their may be some form of neuro toxin that they are being exposed to. As for the high numbers of young dying, in many cases the largest is eating the smaller ones. These large ones are referred to as Tobies.
      Zone 7 A/B
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    3. #3
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      Would you cull those out and not grow on?

    4. #4
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    5. #5
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      Quote Originally Posted by Nguyen365 View Post
      Would you cull those out and not grow on?
      I have let the biggest one live and the other smaller one which developed the problem earlier and in a far worse shape (sharply bent) was culled. Now the bigger seems to swim and eat normally, but with slightly bent tail.

      This happened within days (they were completely normal until suddenly floating with swollen belly), and that is the strange thing. There is no electricity in the aquarium (sponge filter driven by air bubbles), and the water is flowing from the tank that I am keeping my precious survivors from last winter. Water parameters have been the same as the tank, except that nitrate is slightly higher (about 40 ppm).

      No more fries have got this problem.

      I guess that many strange things happen to fish, especially fries, that we cannot really know why!

      By the way these 2 fries with problem have similar coloration, and none of the healthy fries have this coloration. That makes me wonder bad genes.
      Last edited by SimonW; 02-09-2020 at 03:09 PM.

    6. #6
      icu2's Avatar
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      I know languages translate differently but it's still driving me crazy.

      "Fry" is correct for one or a hundred. Example:

      I have one koi fry.
      I have twenty five koi fry.

      Both are correct.

      Also, koi is right for one or a hundred. Example:

      I have one koi in my pond.
      I have twenty three koi in my pond.

      Both are correct.

      --Steve



      Koiphen 2021 Koi Person of the Year!

    7. #7
      SimonW's Avatar
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      Quote Originally Posted by icu2 View Post
      I know languages translate differently but it's still driving me crazy.

      "Fry" is correct for one or a hundred. Example:

      I have one koi fry.
      I have twenty five koi fry.

      Both are correct.

      Also, koi is right for one or a hundred. Example:

      I have one koi in my pond.
      I have twenty three koi in my pond.

      Both are correct.

      Hehehe. One can be unset for less! :-)

    8. #8
      ricshaw is offline Senior Member
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      Quote Originally Posted by SimonW View Post
      I guess that many strange things happen to fish, especially fries, that we cannot really know why!

      By the way these 2 fries with problem have similar coloration, and none of the healthy fries have this coloration. That makes me wonder bad genes.
      French fries

      Koi fry

      big difference

    9. #9
      delbert is offline Supporting Member
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      Cull the bent ones out early

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