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  • PH and Green Mud Ponds

    Me again,
    A friend of mine started to breed koi in a mud pond this year and overdosed the pond with chicken manure when he filled it. He is one of those guys who thinks more is better and fails to listen until he gets problems.
    His fry now 6 weeks old and started dying about a week ago, about fifty a day.
    It has increased to about a few hundred now and he asked me what can be wrong.I asked him if he knows his source water and if he tested the mud pond water to which he replied all things fine and mentioned PH at 7 early in the morning.This afternoon I went to have a look and tested the water again at about 16h00 PH was at 9.2.
    Some fry had terrible bent bodies and some were pink from stress.
    All the bigger ones ( Tobies) died first.
    The pond has more than enough air added.
    My question is what can he do to stop the PH from fluctuating so much.
    His KH measures 120ppm and is quite reasonable.Source water has a PH of 8.0.
    He did a 60% water change yesturday and today the PH is still a problem.
    What can he do to stabilize the PH ?
    Baking soda?
    I recon with all that manure on his pond bottom water changes would not make a big difference.
    His water is almost black from being so green.He has four ponds and all has this problem, could it be the soil?

    Anyone?
    Jaco.
    Jaco Vorster
    South Africa
  • #2

    Sounds like he either flushes the water or moves the fish. Has he been checking dissolved oxygen at or before dawn? It sure sounds like a dissolved oxygen kill to me. DO and pH should be at their low point at dawn and highest in mid-afterneen. Live and learn.steve hopkins

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    • #3

      I've no reliable advice. I am curious about soil conditions on the pond bottom. Dead algae starting to build up as a muck layer? Do gases bubble up if the pond bottom is disturbed? Also, is there blue-green slime algae present?

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      • #4

        Hi Guys,

        The mud pond is new and have been running for about two months now.
        Did not see any algae on the mud itself, only very dark green water.
        I also suspect the problem to be in the soil, a mud pond can only be as good as it's soil and water.
        Jaco
        Jaco Vorster
        South Africa

        Comment

        • #5

          Jako, I've used hydrated lime to great affect when the water has gone sour.
          Maurice.
          http://www.koi-uk.co.uk

          Comment

          • #6

            Thanks Maurice,
            Did you add it to the ponds with the fry in it?
            Do you just scatter it around the sides?
            Jaco
            Jaco Vorster
            South Africa

            Comment

            • #7

              Yes Jaco, added to the pond with the fry in. I tend to lob a shovel full towards the center of the pond, as the fry tend to live around the edges.

              I've worked by trial and error with quanities, I'm on about half a bag per 50,000 gallons.
              Maurice.
              http://www.koi-uk.co.uk

              Comment

              • #8

                Thanks Maurice,

                Great help as always, thanks,

                Jaco
                Jaco Vorster
                South Africa

                Comment

                • #9

                  I was watching this old video of Minoru Mano tasting the mud pond water to see if it was to his liking...It was a real treat to see the master do things by gut feeling..
                  The world sleeps as the chance to learn something new passes.

                  Comment

                  • #10

                    Hi Tony,

                    How many times a day do you read all the old threads on this board?
                    What is the name of this video you are referring to?
                    I am quite addicted to Koi video and DVD and found Brady's new Koi Fixx DVD very interesting and also got to see some people who I always read about, as soon as new ones come on the market I get it.
                    I have about 40 video and DVD in my collection.


                    Jaco.
                    Jaco Vorster
                    South Africa

                    Comment

                    • #11

                      It's pretty important in the beginning of the season to sterilize the pond with lime.
                      so if something had been there it still was. also to amend the soil with clay helps the condition of the properties that leech into the water
                      Dick Benbow

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