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  • Results 1 to 5 of 5

    Thread: Tornato in my Pond

    1. #1
      mpageler's Avatar
      mpageler is offline Senior Member
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      Feb 2005
      Woodbury Minnesota

      Tornato in my Pond

      After the koi pond rebuild, I noticed that the air stream from a single aerated BD seem to bounch around from side to side. With some periodic "burbing", just assumed that it was an irregurlar air output.

      One day, I had the pump off that served the BD/TPR circuit. The air stream was now a uniform, straight column, even with a burp here and there.

      I turned the pump back and and really watched the air column for a awhile. I was memorized as I watched the air column rotate like the tornado in the Wizard of OZ, around the center point of the BD, at about a 10 degree lean.
      Every several minutes or so, it made a complete rotation.

      Surface rotation around the perimeter of the pond was aways noticable. But apparently the TPRs were doing want I wanted, good circulation through much of the water depth, not just in the lower depths.

      At least I thought it was cool.
      Last edited by mpageler; 04-27-2012 at 10:13 AM.
      MN Mike

      5400g 10'x14'x 5
      Dry Stacked Block Walls - Drop-in Liner
      4" BD - Cetus Seive - DIY Skimmer
      125g MB w/8ft2 Biollow9
      Converted Trition II Sand Filter

      My Pond Construction
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      My Indoor Overwintering Tank
      Calculating K1 Bio Media

    2. #2
      jimfish98's Avatar
      jimfish98 is offline Senior Member
      is not losing sleep over the
      opinion of sheep
      Join Date
      Jan 2012
      Central Florida
      Post a pic or video, would like to see that.

    3. #3
      MikeS's Avatar
      MikeS is offline Senior Member
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      May 2009
      Jonesborough Tennessee, United States
      Mine acts the same way but then I have a nearly circular pond with angled TPRs. It rotates clockwise, dunno if that the right direction for the Northern Hemisphere or not
      Mike & Sharon Shaw
      Jonesborough TN


    4. #4
      yorkie's Avatar
      yorkie is offline Senior Member
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      Dec 2007
      Grand Rapids, MI
      My four air domes produce the tornado effect but I only have one that burps.

      A true pondaholic!
      40,000 Gallons, 45 koi

    5. #5
      koiman1950's Avatar
      koiman1950 is offline Senior Member ~ Koi Health Care Committee Member
      is semi retired
      Join Date
      Feb 2008
      San Jose, Ca
      Yes, Mike, with proper circulation, that is what your air domes should look like.

      MikeS, they should actually rotate counter clockwise in the northern hemisphere. Go flush your toilet and see which way the water spins.lol

      Of course, this situation is totally controlled by the directional flow of your tprs.


      check out our website at: http://www.pond-life.net

      "Our goal is to assist with emergency and Koi health issues, as well as educate on best practices. Please help us gain a clear picture by giving the original poster time to answer our questions before offering opinions and suggested treatments."

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