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  1. #1

    Koi Spawning at full speed!

    Just thought you might like couple snapshots from the videos I took yesterday and this morning of our koi spawning at full speed.

    I keep our pond as close to nature as possible with large shallow zone though with beefed up filtration consisting from 18 anoxic baskets, 600L MBBR with 300L Hel-X 13, three shower filters with 140L of Ogata Crystal Bio media + 50L of K1 + 25L of Hel-X17 all together, one outdoor shower with 100L of Hel-X 17 and de-nitrifying trickle tower combo with 100L of Hel-X 17, ASHP heated / tempered.

    Our pond has total of 45 mins turnover time - no chemical treatments - neither koi nor blanked weed, no salt used so far at all. Since this Spring water exchange of about 25% daily replaced with harvested rain water - pond water exchanged used for garden irrigation and especially all our bamboos love the pond water - paying back with stronger growth than before.

    It is former in the ground swimming pool converted over 15 years ago into swimming natural pond and than later into koi pond - total volume measured at 24.000 L - original pool part being 3 x 5 x 1.3m (19.500 L) with added shallow zone (4.500L) with depths from 45 cm to zero - heavily planted as seen on the pictures.

    After whole month of May keeping the pond at 20 dC, I have gradually increased it over last weekend to 22 dC and within just two days our koi jumped on it!

    This happened about two months after frogs did the same and spawned there too (see my Crazy frog post) - enriching the diet of our koi for quite some time - not many tadpoles left growing up in koi pond - but many still growing up in our second smaller unheated gold fish pond.

    It is amazing what intensity is driving our koi - just hope our pond will not be ruined afterwards and our koi will not injure themselves.

    2018-05-31-Soragoi.jpg
    2018-05-31-Soragoi 2.jpg

    So far so good - no visual injuries as well as most plants holding securely with their roots. Only pond water turned from crystal clear to murky dark - hope filters will cope with it well!

    Enjoy!
    2018-05-31-Favorite spawning spot.jpg
    2018-05-31 Caviar Party 2.jpg
    2018-05-31-Chagoi + Soragoi.jpg
    2018-05-31-Soragoi + Shiro Utsuri.jpg
    2018-05-31-Yamabuki Ogon 1.jpg
    2018-05-31-Yamabuki Ogon 2.jpg
    2018-05-31-Yamabuki Ogon 3.jpg


    You get what you pay for - or better - what you make yourself.

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  3. #2
    I hope they don't make to much of a mess. After 5 days of spawning in our pond it's looking awfull. The filters seem to finally be fighting back after what seemed to be a losing battle.

    I suppose the positive way to look at this is I can throw more food in once things are stable again. Been getting some great weather recently so hopefully it continues and keeps the temp up.

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  5. #3
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    Like it Milaz,lovely natural pond and the koi love it i would think a few of the fry will survive in the veg and lillies.
    John

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  7. #4
    Well - all koi seem unharmed and after two eventful days seem to slow down a bit. I have stopped feeding to lower organics load on the pond as well as promote feasting on the eggs - so for couple days our koi will have their Caviar party - while filters will try to deal with the mess left behind.

    Water is still murky - yesterday I added probiotic bacteria - hope it will deal also with the strong "fish" smell pond water has after the spawning.

    On the right hand side at the border with our only neighbor you can see vigorous growth of Fargensia rufa - effectively shielding our pond very well.

    Pond plants still show remains of our darling koi super activity - but by summer should be all gone - till next year ?!?! Koi Spawning at full speed!Koi Spawning at full speed!20180601_080029.jpeg

    Sent from my SM-G955F using Tapatalk
    You get what you pay for - or better - what you make yourself.

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  9. #5
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    Lovely pics Milaz soon be back to normal.
    John

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  11. #6
    Senior Member Rank = Gosai Brandlin's Avatar
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    love your pond miraz - thanks for sharing.
    I always prefer the look of the more natural pond, even though i knowits not always ideal for the fish

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  13. #7
    Quote Originally Posted by Brandlin View Post
    love your pond miraz - thanks for sharing.
    I always prefer the look of the more natural pond, even though i knowits not always ideal for the fish
    Brandlin,
    Let me offer a bit different - maybe to some degree controversial point of view on why I think, that pond with natural zone may be - with good management practice / filtration, turnover etc. actually a good alternative for the fish - I know I might trigger heated debate by my opinion - but please accept it - it is just my personal opinion and experience only - not suggesting everyone needs to do it the same way:

    1. It is very true, that unplanted ponds are easier to control as there is lower variability of the water environment - it is also easier to treat if ever needed etc. - I am not disputing this at all.

    2. On the other side - pond with bigger natural zone offers greater variety of wild life koi can nibble on - different larvae, bugs, snails, tadpoles in the Spring, green feeds from the plant offsprings etc.

    3. Pond with natural zone will never be - and should not be managed like wild pond - it still needs proper filtration - and a lot of it - and high turnover as close to 1x per hour as possible - in our case we have 1xhr turnover with normal filtration - increasing it to 45 mins turnover when switching on ASHP separate line with outdoor shower filter on it.

    4. Water parameters in heavily planted pond will have daily fluctuation greater than in unplanted pond - with pH rising during the day as plants and algae are consuming CO2 from the pond water - and will drop again in the night when photosynthesis stops and plants and algae respire CO2 into the water - this needs to be properly buffered by optimal KH - I found in my case KH of 5 being spot on for my pond setup. Also I run our pond at rather lower pH - aim at keeping it at 7,2 - 7,4 - as at this pH the daily swings seem to be lower and overall environment more stable.

    5. Heavily planted pond is benefiting from water "tunning" by the plants - they grow vigorously and utilize phosphates, nitrates even directly ammonia produced by fish etc. during the main summer season - with heaviest feeding regime - but plants alone cannot filter the pond - very good size filtration is important. Off course it requires proper maintenance prior winter - to remove all dead plants matter away from the pond.

    6. There should be good water circulation in heavily planted pond to avoid any dead zones - as well as high aeration - to run the pond in highly aerated regime - avoiding and suppressing any anaerobes as much as possible.

    7. All plants should be planted only in pure sand and gravel - w/o any plant substrate - it might take them longer to firmly settle in - but once done, they root well and grow vigorously - like the ones shown on the photos from our pond....

    So again - purely my personal opinion and experience - in our particular setup and maintenance regime I never used any chemical treatments or salt neither for koi sickness / parasites nor for blanked weed - only regular UVC at filter entry (55W) and in the drum filter (amalgam 40W).

    So far (knocking the wood) I have lost only two fish - and this purely to my stupidity - when couple years ago I got over excited and over fed them right at end of winter - when rising pond temperature from 8dC I use for overwintering to 15dC early March - did not realized it early enough - and two fish who were feeding most aggressively died from it - learned my lesson from it and go slowly ever since in the Spring with feeding increase.

    So the above are my five cents on this topic I guess - with my experience, that natural wild life zone in the koi pond can be actually good for the fish health......at least in our setup it is.....
    You get what you pay for - or better - what you make yourself.

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  15. #8
    Good post Milaz - really like your pond. Congratulations

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  17. #9
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    Like what you have just said Milaz,a natural pond is hard to beat.
    John

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  19. #10
    Well - it turned out, that last week only Kohaku and Soragoi spawned - as this Thursday morning - after filters barely managed to clean the mess, our Chagoi decided it is their time now.....and made even bigger mess than before - so cavia party continues for second week - switched off automatic feeder - as the first spawning trigfered quite heavy blanket weed growth - given the large organics load created by the spawning......will post some more pictures soon.
    You get what you pay for - or better - what you make yourself.

  20. #11
    Here are some pictures from the second spawning - thick foam on the pond means only one thing - a lot of proteins / DOC in the water filters now need to process:
    20180607_Really thick foam.jpg

    This time I captured it too late - after all the excitement was gone - all koi are now feasting on the eggs already:
    20180607_All koi 1.jpg

    Chags tried really hard - have not seen so many eggs released yet - last week spawning triggered blanket weed blossom - which Chags enjoyed as best spawning ground - softer than the gravel bottom Soragoi and Kohaku had week ago - blanked weed made it also easier to pull it out with a lot of eggs on it:
    20180607_plenty of eggs.jpg

    Our biggest Chag (63 cm) - after releasing so many eggs became slim again:
    20180607_Chags+ Yamabuki+ Kohaku.jpg

    So now hope it is all behind - no more spawning this year .... until next Spring
    You get what you pay for - or better - what you make yourself.

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  22. #12
    how do you catch them in a heavily planted pond like that, won't they just hide in the plants as soon as they see the net?,

    i really love the way your pond looks, but it must be hard work.

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  24. #13
    Quote Originally Posted by familyman View Post
    how do you catch them in a heavily planted pond like that, won't they just hide in the plants as soon as they see the net?,

    i really love the way your pond looks, but it must be hard work.
    So far tried only once - when I wanted to get rid of all the goldfish historically being there first prior koi got in - the only way - lowered water level by about 45cm - so the heavily planted part is out of water - and water is only in the original pool area of 5 x 3 x 1.3 m - than I had fisherman with long net fishing it out as normal pond / lake - got out 48 goldfish he took home but still few sneaked out of the net - so still about 12 are there with our 23 koi.

    Now my worries - after both waves of spawnings - are, that I will need to repeat it - and try to net out all fish - taking out as much of the 12 goldfish remaining plus whatever newborn koi there will eventually be....given the culling ratios of 1 nice koi to 100.000 total born I do not aspire for growing up my own "breed".

    The beauty of such heavily planted pond is, that I really only focus on best water parameters possible - and rest takes care of itself - at least so far - no treatment needed / done.....
    You get what you pay for - or better - what you make yourself.

  25. #14
    Senior Member Rank = Grand Champion voodoo_15_uk's Avatar
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    It makes a right mess doesnít it. I took some of mine out to spawn but my big tancho Showa isnít looking too good and has a prolapse that doesnít look like itís going back in. I fear I may lose her Koi Spawning at full speed!


    Sent from my iPhone using Tapatalk

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  27. #15
    Quote Originally Posted by voodoo_15_uk View Post
    It makes a right mess doesn’t it. I took some of mine out to spawn but my big tancho Showa isn’t looking too good and has a prolapse that doesn’t look like it’s going back in. I fear I may lose her Koi Spawning at full speed!


    Sent from my iPhone using Tapatalk
    After the first spawning our Kohaku stayed in the bottom corner for a few days - as it was her first spawning - probably hard on her - so I started to worry - but ever since she is swimming normally and feeding like earlier - so seems to be OK. No visible damages on any fish - all seem good.

    Yes - the mess was really big - especially the second time - as the picture showed -so I started higher water changes - every 8 hrs 750L exchanged - and four days later filters managed to prevail - water clean again:
    20180612_Mess is gone - 4 days later.jpg
    You get what you pay for - or better - what you make yourself.

  28. #16
    Well - as if it would be not enough spawning already - two waves of Koi - now also gold fish jumped on it today.... fortunately they create much less of a mess - so filters should be able to deal with it swiftly.

    Hope no more - frogs are already out of the water and all over the garden, koi and now hopefully also gold fish are done too by now so peace may return to our pond - no more chasing around.
    You get what you pay for - or better - what you make yourself.

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