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  • % of Water change

    I read in some tread that some people make a change of water of about 5% of the pond volume pro day. That means about one third of the water each week and seams to be too much for me.
    How much water do you renew if you don't have any quality problem on the pond water ?
  • #2

    MINIMUM OF 10% DAILY FOR ME. aS WATER WARMS I DRAIN ALL MY VORTEXES

    TWICE A DAY, SO IS PROBABLY CLOSER TO 20%.


    THE 10% COMES FROM THE CONTUNUAL TRICKLE 24/7.


    AFTER ALL THESE YEARS IT WAS THE CHEAPEST MOST EFFECTIVE THING i COULD DO. nEXT WAS EXTRA AIRATION, NEXT WAS UNDERSTOCKING.....
    Dick Benbow

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    • #3

      Dick,

      I just drain my filter once a week and then complete the level of the pond to the maximum level for my filter (gravity feeded) , so I renew about 4 % of the water weekly.
      I know now that I'm doing wrong, but in summer we often have water restriction to spare the water, so what is the minimum I should renew ?

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      • #4

        Marco,
        Greetings my friend!
        Consider this. Since water changes are difficult for you because of water restrictions, another way to stretch that 4% is to cut the number of koi in your pond.
        Perhaps you have ten koi. If you find a home for one, you have helped the % of demand on your water sourse. Also because you want to know consider a trickle into the pond 24/7. It can amount to 4% but it is constant. You will experience better reults then a once a week.
        I installed an overflow drain on my vortex. When I drain the filters the water goes down and inch or two but builds back over night. Overage goes out the overflow drain.
        water gets old as it gets recycled. Koi and filter bacteria take from it constantly. make the replensihment just as constant.
        In the 3 decades i have been a koi keeper I have often been referred to as a fanatic. I have 4 koi in 2000 gals (winter) and 4 koi in 4,ooo summer. Most people would have lots more. Maybe it was because I spent time in japan. I would enter an austere looking house and sit on the floor with no furniture.
        The art objects were few. But each one was ancient and worth a fortune. It taught me in a zen kind of way that less is more ( for koi numbers ).
        Dick Benbow

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        • #5

          One koi per thousand gallons doesn't seem fanatic to me, Dick. Of course, each fish would have to be fabulous. It does surprise me, though, that you have settled on an even number. In ichibana, an emphasis is placed on things of beauty being displayed in odd numbers. I think you are short one fish!!
          ChrisC

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          • #6

            or ... you can hit 2 birds with one stone ...

            give one koi to me

            and then you will be the fanatic and get an odd number of kois!

            j/k

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            • #7

              I know now what Dick does with the water change ratio, I'm sure I should do like him, he has a really bigger experience them me, but what are doing most of you, 5%, 10% per day ...

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              • #8

                i do 10+% everyday ... 24/7

                not because im crazy, but because i have leak somewhere ...

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                • #9

                  5% constant top-up to overflow, then another 5% once or twice a week when the settlement chambers are emptied.

                  10,000 gallons system, 20 Koi.

                  200+ litres of air in pond
                  Regards, Bob
                  ><{{{{º> ><{{{{º> ><{{{{º>
                  <º}}}}>< <º}}}}><

                  Comment

                  • #10

                    I do about 20% per day when the spring is flowing. If I don't use the water it runs off and is of no use to anyone. I am not completely happy with the quality of the spring water and suspect it adversely effects the depth of the hi. I am slowly learning how to deal with the high iron content. But, touch wood, the fish are healthy and growth rates are good.

                    In a dry summer the spring will stop flowing and then I get really stingy - maybe 1% per day. The cost of tap water is one consideration, but so is the fact that it's a limited resource and someone else may be able to put it to better use.

                    You know, they say that water is going to become more and more precious as we move through the 21st century. What they admit less often is that the quality of tap (mains) water will get much worse as water supplies dwindle.

                    -steve hopkins

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                    • #11

                      Thanks for all the answer, I was not changing water so often because I thought it was not so good for the filtration.

                      I can do it more often when there is no water restriction (usualy two month a year),watering the garden with the water comming out the skimmer instead of using normal water, but considering the water ressource on the planete, does anybody knows if there is a system to treat the water we through away so that we can use it again for pond ? I know there are some products that add minerals in the water.. are they for that purpose ?

                      In a few year the water will be so expensive that only a few people will be able to have big pond just because of the water cost.

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                      • #12

                        I understand perfectly what you mean Marco. Mine is a 70 tons pond. I would like to do a 10% change daily like DickB. But it means 7 tons of water is thrown away per day. I donot have that kind of water supply. So I change only about 5%. Thankfully, fish are ok. Water parameters are ok too.

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                        • #13

                          Marco: I've bumped an old thread on water changes for your review. On my old pond I did 50% water changes weekly, and had started doing a 5% or 10% water change mid-week. On my new pond I do not know what my weekly schedule will become. Right now, I'm doing minor daily replacement of water dumped from settlement and backwashing bead filter ... at least 1%, and more likely 2-3%. The weekend water change is starting at 20%. So, over the course of the week it is amounting to about one-third of pond volume. I will end up at whatever rate gives me stable water parameters, low nitrates (as well as no ammonia or nitrite), and is workable in my schedule. I think regularity and frequency are very important because the pond bio-system will develop a rhythm that matches. That is why the schedule must be compatible with my schedule. Ironically, the goal of water changes is not to cause change, but to maintain stability. I am very fortunate to have decent source water. Those who must treat their source water for anything other than chlorine have a much greater challenge.

                          As you begin increasing your water changes, go slowly. A dramatic shift is not good for the fish.

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