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    Thread: Mitchiesan Dream Pond

    1. #21
      OCkoiFan's Avatar
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      Quote Originally Posted by kimini View Post
      The flow through the skimmers is in competition with the bottom drains. Most skimmers require a minimum differential head in order to operate, which means needing enough flow through the RDF input pipes to produce the necessary head, or having to close the bottom drain valves slightly to induce it.

      Separately, if those are aerated bottom drains, half the floating detritus will get pushed to the other end of the pond, trapping it in the two corners that don't have skimmers.
      I get the idea
      Love to have a skimmer on each corner but feeding area also needed
      I will only do 2 air BDs closer to the skimmers and they can be adjust
      Other 2 bds will me non air closer to the shower
      The showers are weir return and approximately 5’wide each so hoping the flow can move the debris to the skimmers
      M.Nguyen


    2. #22
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      Quote Originally Posted by ckoi View Post
      Wish you all the best on your new pond conversion, will be awesome. Just curious with a pond 4 times the size you have presently , what is your estimate for water costs associated with water changes for the new pond?
      With the 2k gallons pond I do frequent massive water change and my water bil fall between $60-80 monthly
      I’m expecting about possibly double or triple in feeding season
      Still too early to tell at the moment
      M.Nguyen


    3. #23
      ricshaw is offline Senior Member
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      Quote Originally Posted by Paultergeist View Post
      If you simply must use the pool (as a pond), then I would use the entire pool. I would opt for retro-fit bottom drains and no-nitch skimmers — such that everything can be plumbed up-and-over the edge......in this way, the pool will not be damaged and you can always convert it back to a pool if so desired.
      I disagree. The swimming pool will require too much to plumb and filter proper. Mitch is thinking in the right direction.


      member

    4. #24
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      I few years ago I was looking at a property with a built in swimming pool that I thought I might turn into a koi pond.

      My idea was to put in a wooden framework false floor deep enough to accommodate bottom drain piping and running my tpr pipes. Then on one end a substantial wood framed wall to section off a filter pit with bracing for the wall reaching across the pit to the end wall of the concrete pool. Line the whole thing with insulation board and use a rubber liner. This way, everything could be removed without damage to the original pool.

      Would it have worked? Maybe an engineer’s opinion would have been wise, lol!
      Ended up not buying the house, but I still daydream about the pool to pond idea : )
      ________________________________________
      Cheers,
      Ci


    5. #25
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      We are here to help, it takes a village to raise koi.... Koiz

    6. #26
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    7. #27
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      It is new year
      My old people alway tell me
      New year all Dreams come alive
      I am a Believer
      Join me celebrate year ̣ the Golden Ox
      The project officially started until i get a break from my full time job
      Attached Images Attached Images  
      Last edited by OCkoiFan; 02-12-2021 at 10:55 PM.
      M.Nguyen


    8. #28
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      Okay flow and pumps
      I will use an rdf with 6-4” inlets and 4 Periha p25k pumps then to 2 mega showers with 2-3” spray bars for each shower

      Option 1
      All 2-4” skimmers
      4-4” bds
      Direct to RDF

      Option 2
      4-4” bds to rdf then 3 or 4 Periha p25k
      2-4” skimmers pump pull by another Periha for more flow
      M.Nguyen


    9. #29
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      The dream begins today...

      .
      Attached Images Attached Images  
      M.Nguyen


    10. #30
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      Best of luck.
      Nancy



      Koiphen 2013 Koi Person of the Year!

    11. #31
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    12. #32
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      Pool fully drained

      The Pool is fully drained after 10 hours
      Materials also delivered today
      I picked up 6-20 footer sch 40 pvc on Friday
      Pretty much I have everything except the pond liner coming on wed and wait out on the Seaside PP65 rdf still wondering at LA harbor
      Attached Images Attached Images     
      M.Nguyen


    13. #33
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      Look like it will be done at no time!

      hp.

    14. #34
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      Quote Originally Posted by hp View Post
      Look like it will be done at no time!

      hp.
      I hope so brother
      With my full time job I only leave with Sunday and half Monday for the pond
      M.Nguyen


    15. #35
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      Hella gangsta!!! Keep the photos coming

    16. #36
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      My swimming pool has been a pond for around 18 years now. Been just fine.

      Doug - out
      See Our Pond https://www.koiphen.com/forums/showth...ond&highlight=

      Blank Check Project - Helping those who stand on that wall. www.blankcheckproject.com

    17. #37
      leAnn is offline Senior Member
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      the Density of the water is 997kg per m3? how do I calculate the force against a wall under water, if a wall length 12 ft, height 5 ft? I am about to convert a pool to pond too!
      LeAnn

    18. #38
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      Water applies about 62.5 lbs per square foot at one foot depth, about twice that at two foot depth, three times at three foot depth and so on. Your 5 foot high wall will see about 1000 lb load per lineal feet of wall, with the highest pressure (over 300 lbs per square foot) near the bottom of the wall.

      It will be extremely difficult to make a single free standing flat 5 feet high wall over a 12 foot distance to resist water loads. The sheeting and bracing within the wall itself needs to resist 1000 lbs per square foot pressure near the floor, and the anchors of the wall needs to resist the accumulated pressure of many tons. The typical in-ground swimming pool is supported by soil pressure spread over the entire area of the pool. And the "skin" of a concrete pool will not be suitable alone to anchor your divider wall into. I posted my suggested filter pit wall design in post #18, it is conservative, but it will work.

      Just my thoughts.

    19. #39
      OCkoiFan's Avatar
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      Quote Originally Posted by leAnn View Post
      the Density of the water is 997kg per m3? how do I calculate the force against a wall under water, if a wall length 12 ft, height 5 ft? I am about to convert a pool to pond too!
      LeAnn
      I am thinking of standing there and using my internal power since I watched Shaolin kungfu kekeke
      This is where my 20 years experience holding power tools daily as a living stay tuned ...
      M.Nguyen


    20. #40
      OCkoiFan's Avatar
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      Quote Originally Posted by Grumpy View Post
      Water applies about 62.5 lbs per square foot at one foot depth, about twice that at two foot depth, three times at three foot depth and so on. Your 5 foot high wall will see about 1000 lb load per lineal feet of wall, with the highest pressure (over 300 lbs per square foot) near the bottom of the wall.

      It will be extremely difficult to make a single free standing flat 5 feet high wall over a 12 foot distance to resist water loads. The sheeting and bracing within the wall itself needs to resist 1000 lbs per square foot pressure near the floor, and the anchors of the wall needs to resist the accumulated pressure of many tons. The typical in-ground swimming pool is supported by soil pressure spread over the entire area of the pool. And the "skin" of a concrete pool will not be suitable alone to anchor your divider wall into. I posted my suggested filter pit wall design in post #18, it is conservative, but it will work.

      Just my thoughts.
      Thank you
      Let me break down this wall more details
      The wall will be in the middle of the pool and it has a slope now
      What I intent to do in run my PVC pipes on the current floor
      Then I will form and do a pour for a foundation footing let says 16’x1’ by 12”-16” height
      The filter pit side will be anchored with steel braces
      Then I will start to stack each rolls up until I get to the top edge of the current pool about 4-5 rolls
      Additionally enforcement will be drill into the sides pool for horizontal rebars per roll of blocks before filled
      This will ensure the footing stability and middle section
      From there I will have even four sides and surfaces
      Then I will do 3 additional rolls around all four sides
      These top rolls will held together by the blocks on the sides which I found it is 1/3 the strength already
      I can do additional bracing 4x4” to the side depend on how this turn out
      Attached Images Attached Images   
      M.Nguyen


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