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  • Page 3 of 3 FirstFirst 123
    Results 41 to 45 of 45

    Thread: nitrates and koi health

    1. #41
      kevin32's Avatar
      kevin32 is offline Senior Member
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      Quote Originally Posted by RichToyBox View Post
      If the amount of nutrient being produced per time period is 1% and the water change is with water that has 0% but at the 10% rate for the same time frame, the steady state value will be accomplished when the 10% removal equals 1%, or the amount being produced. That occurs when the level becomes 10%, remove 10% of that gives 9% and then the production of 1% brings the value back to 10%. How long it takes to get there is dependent on where you start, as if you start with 100% then the first 10% removal will be 10% leaving 90% but add 1 % and then do a 10% and remove 9.1%, but you are now down to 81.8% and the closer you get to the 10% the slower the change.
      happy New Year. i have no clue what any of that means lol

    2. #42
      BWG is offline Senior Member
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      Quote Originally Posted by kdh View Post
      I have heard of this many times. Can you explain ?
      My background is engineering and computer science so there will be no aquatic biology in depth explanation. This is how its been explained to me by commercial interests.

      For the hobbyist level on the aquarium and ornamental pond side you will not get a consensus. For commercial production its a consensus sudden temperature and water chemistry changes equates into a stressful environment for the whole system. Stressors may lead to poor fish health and should be avoided if possible.

      If an emergency situation arises, yes you will see massive water changes. Otherwise water exchange adjustments are small, incremental and monitored by continuous testing.
      Last edited by BWG; 3 Days Ago at 12:51 PM.

    3. #43
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      Quote Originally Posted by BWG View Post
      My background is engineering and computer science so there will be no marine biology in depth explanation. This is how its been explained to me by commercial interests.

      For the hobbyist level on the aquarium and ornamental pond level you will not get a consensus. For commercial production its a consensus sudden temperature and water chemistry changes equates into a stressful environment for the whole system. Stressors may lead to poor fish health and should be avoided if possible.

      If an emergency situation arises, yes you will see massive water changes. Otherwise water exchange adjustments are small, incremental and monitored by continuous testing.
      I do not see how fresh water is a stressor. I understand that if water parameters/temps are pushed than it could be a stressor. I have done my share of 98% water changes and the only affect I was able to achieve. Is the koi were more active getting into things plants etc and ate like pigs.

      I believe there are a lot more variables than what well ever be discussed on KP of large water changes and all the different ponds and water qualities out there. And situations that can arise.

      I believe it should be for ponders. Large water changes can,might,could create issues, not, they well. But really don't know. And I could be wrong.l

      I have noticed over the years on KP how some things that (might, could, can) have moved into the category of will.

      I might as well add to this thread since I am here about my understanding about nitrates.

      Nitrates can affect skin quality, create veining and even damage to veins, lower reproduction rate, stunted koi, less appetite, slow healing,lethargy, kill young koi, compromises immune system that can leads to bacterial,viral, parasite infection.

      I,m sure there is more but all I got. And I could be wrong.

      The condition of each thing I mentioned depend on different variables of duration, levels of nitrates and other pond conditions. And this is were it gets tricky and information is hard to come by. As research is limited in this regard.

    4. #44
      BWG is offline Senior Member
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      Personally for me it's just easier to plan for a weekly water exchange of XX and add that amount at a slow rate continously through the week. Dump setting chambers on a regular basis and let any excess go out the overflow.

      No temperature or water chemistry swings.

      It's just less work and safer for me. (Yes I have forgotten before and drained too much water out or left filling for a long time but luckily we are on well water)

    5. #45
      Essex Koi is offline Senior Member
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      In the past 12 months I’ve done a 3,000 gallon change twice on a 4,000 gallon pond with no issues, same as kdh, the Koi were eating voraciously after the changes. Currently I’m doing 2 x 500 gallon changes + 3 x 250 gallon changes every seven days, adding dechlorinator of course, so that’s 5 days per week of fresh water going in.

      Nitrate levels are usually below 20ppm and the fish are growing really well in the heated pond at 68f currently.
      4000 US Gallon Pond, 14 Koi.

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