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Thread: mud pond - how deep??

  1. #1
    Jumbo Steve Nguyen's Avatar
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    mud pond - how deep??

    my brother is planning to build a mud pond with dimensions of 8 meters long and 6 meters wide. he's asking me how deep should the pond be. I don't have any experience in mud pond so any advise is greatly appreciated.

    Steve

  2. #2
    Jumbo dcny's Avatar
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    There's a wealth of info in KFG's Pond Construction thread. When you have some free time look it over.

    -Dan

    Pond construction begins

  3. #3
    Daihonmei
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    Starters.
    3-4 ft deep for tosai
    3-7 ft for older

  4. #4
    Daihonmei MikeM's Avatar
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    For older fish, Sakai has said that 2 meters (7 feet) is ideal.

  5. #5
    Daihonmei
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    What Does He Know!

  6. #6
    Jumbo Steve Nguyen's Avatar
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    Guys,

    thanks for the recommendations. one more question. do you know if water specs are the same for mud pond such as ammonia/nitrite readings as compare to liner/concrete ponds? I read the KFG's pond building thread (Wow!!) and there is only mentioned of swing in pH.

    thanks

    Steve

  7. #7
    wild horse dinh's Avatar
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    Do you think 8m x 6m (26' x 20') is kind of small for a mug pond?

    --Dinh

  8. #8
    Jumbo Steve Nguyen's Avatar
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    He wants to try out some koi in his yard to see how the fish response to the water condition at his place. he only plans to raise 6 to 8 koi in this mud pond. is that too many? I don't have any experience in mud pond so I am clueless.

    Steve

    Quote Originally Posted by dinh
    Do you think 8m x 6m (26' x 20') is kind of small for a mug pond?

    --Dinh

  9. #9
    Daihonmei MikeM's Avatar
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    Mud pond water parameters will vary due to the interaction with the soil and microbes in the soil. Different soils will have different impacts. Clay and sandy soils with little or no humic content are generally preferable for numerous reasons, but each type of clay and type of sand differs. It is one of the reasons why the Japanese breeders have found some ponds better than others, and some better for certain varieties compared to other varieties. Enjoy the learning experience!

  10. #10
    Oyagoi bekko's Avatar
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    Unless the pond will be dug down into the water table, the first thing to do is have a soil test done to find out if the soil will retain water. If the pond is not dug into the water table, he will also need to have an economical source of water. Even with the best of soil, most mud ponds leak for a while. Sometimes it only takes a few months for them to seal themselves, sometimes it takes a couple of years. They do not usually seal up properly until the water turns green or other organic matter begins to accumulate. In the mean time, your brother will have to keep adding water. If he is trying to keep it full with tap water, it will get very expensive.

    It is likely that your brother will need to put in a pond liner so he can control seepage. The liner will cost $400-500, but can probbly save that much in water unless he also has a good water well. After the liner is installed, he can put 10-20 cm of soil back on top of the liner to get all the benefits and headaches associated with a mud pond.

    Once the water turns green or other plants start growing, ammonia/nitrite will not be a problem. The feed input into a mud pond is generally much lower than a display pond because the fish load is much lower. Less feed = less ammonia. Without aeration, the feed rate can only be 3-4 grams per square meter per day, or 150-200 grams per day for the whole pond. At 2% of the body weight per day, this would equate to 7.5 to 10 kg of koi. 6-8 fish would be OK to begin with. He would need to add aeration as the fish grow.

    -stevehopkins

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