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  • Growth

    We talked about your largest koi in the thread below. How about what is the most growth you got out of a koi in YOUR POND in one year. My pond will be up and running for one year next month. One of the test koi was a yamabuki ogon. I was getting good growth out of it so I kept it in the pond. The koi has put on 10" since it went in. I had one other one I was getting better growth out of, but it hit it head jumping out of the water for food. So I removed it from the pond. I'm sure I would have got even more growth out of that koi. This is another koi I'm getting some good growth out of. I pulled it out yesterday and it put 3" on since it went into the pond. I will have to see how long I have had this showa. It's hasn't been all that long.


    Keep it simple, keep it straight
  • #2

    I know I gave Akinosan a Yamabuki Ogon earlier this year. It meassured 15" and now it is 20" and that is since Feb.
    The world sleeps as the chance to learn something new passes.


    • #3

      I can usually get tosai acquired in February or March to gain 14"-16" over a year. Then they slow down a great deal. I have not tried the so-called jumbo tosai that are already 18"-20". I doubt they would grow as rapidly during their second season, but some day I'll give it a try & see.


      • #4

        Mike can you tell us a little more about your pond, stocking levels, food, water changes, water temps, or any other things that you think can add to growth.


        Keep it simple, keep it straight


        • #5

          The main factor is simply being in Central Florida. My early morning water temps are typically in the mid-60sF during the "winter". During an extended cold spell, maybe down to 57F for a night. Most days the temps rise, so even in "winter" the fish experience 70ish warmth. By March, water temps are well into 70sF and do not go below 70F until mid-December.

          The second factor in my opinion is water changes... keeping pheromones/hormones low. On my old pond I stocked at a rate of about 1 koi per 300 gallons. I considered it over-stocked. I was doing 50% water changes weekly. On the new pond we'll see what kind of growth can get. It is stocked at about 830 gallons per koi and I am doing approx. 30% water change cumulatively over the course of a week.

          No special food. I feed a mix of pellets, using high protein foods in the May thru October time period. Brands: Hikari, Azoo, Tetra, Medicarp... and others from time to time. When I can get it, there is a sinking pellet produced cooperatively for the Niigata koi farmers which is very high protein... sometimes called "Niigata Breeders Blend". Not to be overlooked: algae in the old pond. The koi grazed nearly all day. The new pond will take a year to establish a healthy growth of algae.

          Warmth; clean, fresh water; and abundant, good food.


          • #6

            My best growth achieved has to be this Momotaru kohaku.

            Date of birth April 03.

            Purchased her on April 04 at 40 cm and has been in my pond since. Measured her 2 weekends ago at 70cm.

            Attached is her photo.


            Attached Files


            • #7

              Hi doc, it sure doesnt show any sign of slowing down yet .. good and thick beni and the shoulder shiroji is stressed out in blood shot or just the picture maybe.

              I think wt good water management and genetic, excellent grwoth rate is achievable. The concern is by growing too fast we often failed to maintain skin quality, espc the red on kohaku. I would like to know what kind of method you use for maintaining the quality of red (Do you use spirulina, exposure to sunlight, or others?)


              • #8

                Hi Paulino88, to be frank I really don't know. What I can tell you is what I have experienced and how I maintain my pond.

                My pond is relatively small (20 tons) and my filter is big (150% of surface area). I have a total of 360W airpump servicing the pond. I change 10% water daily. About 40% of my pond is exposed to sunlight. I used to feed only non-spirulina pellets with silkworm pupae, and since I acquired a Sakai Rose kohaku, which was pampered by the previous owner with an extremely "tasty" spirulina pellets (she just "refused" my usual feeds), I have since been using the said spirulina-based pellets. From personal observation I did not see any noticeable difference on beni whether I used spirulina-based pellets or not.

                We were told the usual factors to improve on beni are colour food and sunlight. I personally feel strongly that a good environment and lots of aeration (hence healthier kois?) play a part. It makes sense as healthy kois have better sheen and lustre.



                • #9

                  dtbh: That much growth on a koi already 40cm is pretty good, I think. She sounds destined for jumbo. Got a pic?


                  • #10

                    Hi Mike

                    The attached photo in my earlier posting was taken in Jan 05. She was adopted by a friend 2 weeks ago when she was measured prior to being bagged. Unfortunately I did not take a photograph then. Sorry, Mike.


                    • #11

                      both of the koi pictured in this thread are very nice and i'm sure the owners must be very happy with them.

                      I run 500 gallons per koi and my biggest problem is I can't afford to heat the outside pond ( which gives them 1,000 gallons per koi ). The northwest is extremely cool and at the zenith of summer the outside (unheated) may achieve 70 F at best on any one day but not extended.

                      I have an asagi that is magoi bloodline and is already surpassing my iggi showa
                      that spent two years in the mud ponds of niigata. ( showa is 6 years old and asagi 4 ) bottom line space and genetics and metabolism ( warmth) seem to play mightily into the mix. Too many people like Mike S feel RO water plays a part in the mix as well to be ignored or not included for consideration
                      Over the years I have noticed some ponds work and some don't. I had a chat with a close friend not too long ago about his rebuilding of his ponds and discussed the koi happiness factor. He has his old original pond that was built as much for looks as anything. He also has a state of the art one. the koi in the old pond with lots of nooks and grannies depths and shallows appear much happier. Wish I could put my finger on exactly why but I too thru observation have noticed this as well.

                      I remember when kentaro sakai of Hiroshima came to my pond and sat 10 mins and began making recomendations. one was to kill the air and current on one side of the figure 8 to give koi a choice as to where they wanted to be in, quiet or active water. ( BTW they always jammed into the active side) LOL
                      but i mention this not to cast dispersions on a great koi mind but to point out
                      there needs to be some consideration along those lines or Ken would not have mentioned it.
                      Dick Benbow


                      • #12

                        Hi Dick, You have a point there. Just like humans a happy koi tend to be a healthy koi and vice versa.

                        It is interesting that you mentioned one should provide "quiet" areas for the comfort of kois. On the other side of the coin we with hot weather all year round have to contend with oxygen content of "quiet" areas. I suppose the kois will know what is and what is not comfortable for them as far as oxygen content is concerned. And then there is the thunderstorms we experience during our intermonsoon seasons which again plays havoc with the water O2 content. I prefer to have evenly distributed O2 content throughout the pond which I hope will be less stressful for my kois (and hence better apetite/growth). For my pond this will mean airstones at all 4 corners of my rectangular-shaped pond with a central uniring.

                        Cheers, dtbh


                        • #13

                          There are so many different ideas about growth in Koi, but a good friend of mine has grown very good quality Koi beyond 26" in a 1,500 gal. pond. How is this possible?
                          " Da Best" Chapter


                          • #14

                            Originally posted by Akinosan
                            There are so many different ideas about growth in Koi, but a good friend of mine has grown very good quality Koi beyond 26" in a 1,500 gal. pond. How is this possible?
                            It's kinda hard to believe someone can grow koi to 26" or even 28" in a 1500 gal pond, but it is possible. Water quality, fish load and food are the key!!! I know of another hobbyist who was able to grow a Jimbei Male Sanke in his pond to 29" and his pond was no more that 2 feet deep. But if you look at the water there was a slight green tint that made the difference and low stocking...
                            The world sleeps as the chance to learn something new passes.


                            • #15

                              There is a pond in San Mateo, less than 2000g, 2 ft deep, with a minimum sand filter, with at least 4 huge kois (I was told more, but saw 4). each longer than 36". The pond is almost totally covered in water hynachin.



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