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  1. #41
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    Sounds like a big hole Steve,would it be a good idea to slope the bottom to the drain like a saucer so all the muck can collect towards the drain.
    In my opinion 1.5 mtr depth would be the ideal and 12x10 mtr for the pond you may have problems if you ever have to catch them,maybe a small boat would help.
    John

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  3. #42
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    Quote Originally Posted by JohnS View Post
    What exactly says a pond is full, I see ponds with loads more fish than I have and half the time I have to search for mine when it's cold lol starting a new filter

    Sent from my SM-G950F using Tapatalk
    And john it depends on the size of the fish.
    John

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  5. #43
    Member Rank = Tosai Dudley's Avatar
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    LOL The liner is 12x10 so at 1.5m deep it will be about 8x6m surface area.
    Didnít you read my last post, I am a scuba diver, I will slip into a dry suit, stick a tank on my back and go in and get em,🤣

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  7. #44
    Moderator Rank = Grand Champion Feline's Avatar
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    I am thinking your 3% salt is a typo and I hope you mean 0.3%. Koi do not do well in sea water ....

    If you heat to good growth temps of 24C then you should find you can mature your filter in a few weeks. Fortunately your fish load will grow as the filter does. It would have been ideal to try and fishless cycle the system prior to the fry arriving, but if you keep on top of testing and are prepared to do some serious water changing then you should be able to get them through it.

    Do you have any mature pond media you could 'borrow' for the new tank for now? It doesn't completely prevent NPS but really helps shorten it if you have.

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  9. #45
    Member Rank = Tosai Dudley's Avatar
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    Hi Feline
    Yes a typo, it was 0.3 now 0.1 lol.
    My ammonia went up to 1 but has dropped to 0.6 and my Nitrogen has gone from 0 gradually up to 25 ish now.
    So Iím thinking the filter is working,
    Thing about moving water temp up to 24, which I would like to do is it makes the ammonia worse for the fish. I think thatís what I read the other day.
    I donít have any other tank of mature filter medium Iím afraid.
    Oh also I noticed my water hardness has changed over the last two days, itís been a constant 15 drops to turn to from dark pink to blue, two days ago it was 14 drops, and yesterday 13. Not tested today yet. So it looks like the water is getting softer.
    I think thatís a good thing?

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  11. #46
    Quote Originally Posted by Dudley View Post
    My ammonia went up to 1 but has dropped to 0.6 and my Nitrogen has gone from 0 gradually up to 25 ish now.
    So Iím thinking the filter is working,
    Well it looks like your little fishies are crapping like they've been out for a curry starting a new filter so it might be that you need more media in the filter or faster through put because the ammonia eating bacteria is usually the quickest to mature and they arnt coping.
    If you mean nitrates not nitrite , god I hope you do are rising you will need more frequent water changes. I know they are not dangerous but they create a bit of a, what I can only describe, as a bad smell in the water.

    Oh and if your hardness is changing I believe it may effect your Ph so keep an eye on that too.

    Well that's how I understand it, anyway

    John

    Sent from my SM-G950F using Tapatalk
    Last edited by JohnS; Yesterday at 12:59 AM.

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  13. #47
    Quote Originally Posted by john1 View Post
    And john it depends on the size of the fish.
    Ok yes I understand, gotta think of the future size of the koi.
    In an average unheated British pond, not feeding anything special, what size would you expect them to reach.
    10 of my koi are around 16 inch and my 3 golden orfes are about 20 inch but I inherited all those and don't know there age. My others are recent buys and are 6 to 10 inch

    Already considering a second pond in a few years for the 4 sturgeon my missus loved so much. 2 Siberian and 2 diamond back.


    Thanks John

    Sent from my SM-G950F using Tapatalk

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  15. #48
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    Morning John,It is a big debate when you ask what size to expect from a koi but a lot say it depends on their genes,the food and water quality.
    I have had very good growth this year as i changed my food so i put it down to that and my 17yr old is still growing and must be 30ins.
    I dont heat and never have except in the grow on and that is because of the expence.
    Like you i buy around 5-6ins and grow on and spend around £25 each but the most i have spent on a 7ins koi was £70 earlier on this yr as when i saw her i had to have it and she is show quality and growing on in the tank over winter.

    Golden orfe are lovely fish i had some many yrs ago but you have to be carefull if you treat the pond with a chemical as they react differently than koi.
    John

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  17. #49
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    Morning Steve,Good to hear the ammonia has dropped a bit but i would get the tricle going easy to do and doesnt have to be fast.
    They say 24 deg is the best temp but i usually keep it at around 20 and they are active enough at that,but i have larger ones in the tank at the moment around 10 ins and they are at 18.5 deg and eating well,i dont need massive growth rate just enough to get them through the winter and i would expect them to put on a couple of ins.
    John

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  19. #50
    Member Rank = Tosai Dudley's Avatar
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    Hi John
    I can easily set up a pipe off the mains to trickle feed with an overflow on the tank, but how do I add de-clorinator without an in line de-clorinator?
    At the moment I have a water butt, so know the water volume and add chemical to that. Does one estimate the trickle feed quantity and add chemical directly to fish tank?
    Or should I set up a header tank, fill it, turn off supply, add chemical, allow to trickle feed, and when empty re fill?

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  21. #51
    Member Rank = Tosai Dudley's Avatar
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    Sorry I should think before I write. 🤪
    Yes John I meant Nitrate not Nitrogen.

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  23. #52
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    What sort of dechlorinator do you have Steve?
    Most on here use sodium thiosulphate which is cheap and de-chlorinates for a couple of days,so if you had a slow inlet and mix about 1/2 T spoonfull of s/t in some warm boiled water and throw it in every couple of days you should be ok.
    You can get dpd4 tablets as per mankys site to check for chlorine and very effective.

    Or, as you say a header tank drip feeding in allready de-chlorinated would be fine.
    Would definately get some s/t did i give you a link?
    John

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  25. #53
    Member Rank = Tosai Dudley's Avatar
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    Quote Originally Posted by john1 View Post
    What sort of dechlorinator do you have Steve?
    Most on here use sodium thiosulphate which is cheap and de-chlorinates for a couple of days,so if you had a slow inlet and mix about 1/2 T spoonfull of s/t in some warm boiled water and throw it in every couple of days you should be ok.
    You can get dpd4 tablets as per mankys site to check for chlorine and very effective.

    Or, as you say a header tank drip feeding in allready de-chlorinated would be fine.
    Would definately get some s/t did i give you a link?
    Hi John
    Either you or JohnS gave me the details of sodium thiosulphate the other day, and Iíll get some, been using Blagdon Pond safe.
    Thanks.

  26. #54
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    John

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  28. #55
    Member Rank = Tosai Dudley's Avatar
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    Quote Originally Posted by john1 View Post
    Thank you. Itís purchaced.
    But on the trickle feed idea, I am looking at setting it up. Going to do it mostly with whatever I have on the farm, but regarding the flow rate! What sort of rate of water changed do you think I should aim for with 129 little koi in say 26 gal. At the moment there is tonnes of room, if Iím lucky and dont have too many die then I know I will have to cull out and re tank etc, but for the next 4 months say, what sort of water turnover?
    I have been doing around 100L change a day.
    Thanks Steve

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  30. #56
    100 l a day sounds about right in a 700 l tank. But if your nitrates stay high I would change more until you bring it down. So set your trickle accordingly.

    Just my opinion, others might have a better idea.

    John

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  32. #57
    Extreme Koi Member Rank = Grand Champion john1's Avatar
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    A 100 ltrs a day in a 1000 ltr ibc is ok at 10% when you have some ammonia.
    If your ammonia drops i would be only doing a fast drip in,if you use a water butt it could be guaged with the little tap on it,depends on your ammonia level really and adjusting the water inlet flow accordingly.
    As they get bigger you may have to up the flow a bit more.
    Is that a miss type " 126 little koi in say 26 gal "
    With you heating it will drop the temps a bit with big water changes thats why you would benefit with a slow tricle.
    John

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  34. #58
    Member Rank = Tosai Dudley's Avatar
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    Quote Originally Posted by john1 View Post
    A 100 ltrs a day in a 1000 ltr ibc is ok at 10% when you have some ammonia.
    If your ammonia drops i would be only doing a fast drip in,if you use a water butt it could be guaged with the little tap on it,depends on your ammonia level really and adjusting the water inlet flow accordingly.
    As they get bigger you may have to up the flow a bit more.
    Is that a miss type " 126 little koi in say 26 gal "
    With you heating it will drop the temps a bit with big water changes thats why you would benefit with a slow tricle.
    Yeah, depending on how much water I take out and put back its around 600-800 L so around average of 184 Gal. That's a good thing about the IBC, having volume markings up the sides. I siphon out twice a day, as I have no bottom drain, and the siphon suck picks up all the muck of the bottom.
    My stored water, at the moment is in the same room as the fish IBC, and as I am heating the room as apposed to the tank, water is all at the same temperature. But when I set up a trickle feed it wont be, but as you say, a fast drip wont change the the tank temperature much. As it gets colder I will heat the tank directly and just keep the chill off the room with a heater on a thermostat.
    I am away from Sunday until Wednesday, I have had my apprentice enthralled in this fish keeping since they arrived, even had to set up a feeding chart on the wall, as sometimes I go in there and can tell they have been fed, so now feeding is regulated. But that's not the ammonia prob, they haven't been that over fed. Anyway, he is going to look after them for me. So if I go quiet for a bit you know why, its not because I have killed them all.

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