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  1. #21
    Senior Member Rank = Grand Champion samp09's Avatar
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    Excellent thanks Syd, I can rule that out then. I may get a carbon filter anyway at some point just to remove impurities from the tap water, it can only help can't it.

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  3. #22
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Keep meaning to get one aswell mate . Pond e who'd have one always more money to spend lol

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    Freddyboy the legend

    "we are water keepers first"

    Johnathan

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  5. #23
    Quote Originally Posted by Aris View Post
    Andre Asagi, in the last 3-4 years that the big ones started dying, they did so during spring time, after the cold months.

    I don't use dechlorinator , I add water very slowly.

    .I had not considered the oxygen issue as the Bitron 30 filter is pressure fed from the submerged pump that sprays it in the inlet and I also have a waterway with a cascade at the end. I never had an oxygen tester so I’m getting asap the Tetra 02 test that I located available here.

    Once I test it will post results


    Thanks!
    I would defiantly add a big air pump to the pond. I don’t think that waterway cascading would be any where near enough oxygen. But if your fish are struggling for air they apparently gasp for air at the top! But i don’t know any koi pond that doesn’t have a spin drifter or large air stone bubbling away in the pond as it’s essential for your kois health. I checked out that filter too and they expensive bits off kit but still look very low compared to ya pond size and fish amount! I would add some extra filtration to ya current set up! Don’t have to spend a fortune a barrel of k1 after what you have or anything to help ya existing filtration out! All the best mate fingers cross things sort out!


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  6. #24
    Senior Member Rank = Hassai big h's Avatar
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    I would go with oxygen deficiency. Koi would have to be in a pretty sterile environment to starve to death.It would take a long while .In all fairness,it wouldnt harm as mentioned,to do a mix of floating and sinking food

  7. #25
    Senior Member Rank = Hassai big h's Avatar
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    I would go with oxygen deficiency. Koi would have to be in a pretty sterile environment to starve to death.It would take a long while .In all fairness,it wouldnt harm as mentioned,to do a mix of floating and sinking food I know Cyprus gets a lot of thunderstorms in spring.Is there a link between thunderstorms and fish deaths in your pond ?

  8. #26
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Hello and welcome Aris, lovely pond and a good size.
    I would go for oxygen as you must have some high water temps in Greece and being a long and narrowish pond the oxygen will depreciate quite quickly,can you put an extra air pump in.

    I dont have any air in my pond but I do have a strong return from a shower which gives loads of oxygen.
    You have kept koi for a number of years Aris but the best feeding advice is little and often.
    Maybe you are at work all day but could you not feed in the morning as well?
    As you have a long pond and the filters are pump fed I presume the pump is at the opposite end to the returns maybe there is some poo settlement happening in between along with bad bacteria.

    Hope you get it sorted ok Aris would definitely go for more oxygen.

    Ie... love Greece,my wife and I have been for a lot of hols there and i would live there in a flash
    John

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  10. #27
    Extreme Koi Member Rank = Nisai harryc's Avatar
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    You say the koi die as you come out of winter so I wouldn’t jump straight onto the lack of oxygen theory unless of course your temps jump to 30C straight after winter.

    If it was lack of oxygen they are more likely to die during the peak of summer.

    Just my views.

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  12. #28
    Senior Member Rank = Hassai big h's Avatar
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    Regarding ST,if i top my pond up with 200 gallons of tap water,am i right in saying i only need to put 4g of ST in. I just mix it with water in a container and sprinkle it where the hose goes in .Does that sound lazy or acceptable

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  14. #29
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by big h View Post
    Regarding ST,if i top my pond up with 200 gallons of tap water,am i right in saying i only need to put 4g of ST in. I just mix it with water in a container and sprinkle it where the hose goes in .Does that sound lazy or acceptable
    That's all I do mate yeah

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  16. #30
    Senior Member Rank = Hassai big h's Avatar
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    Thanks.I was confident it was ok.but sometimes if things are too simple it makes me wonder

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  18. #31
    Senior Member Rank = Supreme Champion Ajm's Avatar
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    Quote Originally Posted by big h View Post
    Thanks.I was confident it was ok.but sometimes if things are too simple it makes me wonder
    Know what you mean mate st go's against every thing else in koi keeping its to cheap easy and simple. It's not right lol

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    Johnathan

  19. #32
    Senior Member Rank = Hassai big h's Avatar
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    I think they should treble the price and blame covid

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  21. #33
    Senior Member Rank = Adult Champion Twhitenosugar's Avatar
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    Quote Originally Posted by Ajm View Post
    Know what you mean mate st go's against every thing else in koi keeping its to cheap easy and simple. It's not right lol

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    I can sell you a 1kg bag of ST for only £50 if that would make you feel better My large koi are dying !

    Sent from my Pixel 4a (5G) using Tapatalk
    13,000L fibreglassed raised pond with window

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  23. #34
    Quote Originally Posted by Twhitenosugar View Post
    I can sell you a 1kg bag of ST for only £50 if that would make you feel better My large koi are dying !

    Sent from my Pixel 4a (5G) using Tapatalk
    Don't accept that offer, its a rip off price - I'll sell you a kilo for £49.

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  25. #35
    Junior Member Rank = Fry Aris's Avatar
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    UPDATE
    OK, thank all of you for your interest and valuable help with which now I am close to understanding and resolving the problem.

    First the Oxygen issue. With the filter spraying the water, the waterway and two cascades/falls, I thought I was ok, so I got the Tetra 02 test and here are the results:
    The valued tested at 8 mg/l, however I needed to assess the values in relation to the water temperature as per the chart in the instructions. We are today in a heat wave with max for the month temps, so I measured the water at 24 degrees early in the morning and at 28 degrees at 3:00 pm (the values are Celsius). Doing the numbers instead of 8mg/l I adjusted it down to 6,4mg/l, which I Googled it close to the minimum safe of 6mg/l. Nevertheless, considering that all big ones died in mid June when the weather was cooler, I believe that Oxygen is not the reason the big ones are dying, or at least not the only one.

    Second the feeding issue: The big ones never had enough to eat! Looking carefully now when they feed, I can see the medium/small ones devouring most of the pellets, before the big ones have a chance to eat their needed share! The big ones are not agile enough to scrounge for pellets so they end up eating much less than what they need to!........So it appears I have starved the big ones to death….. ☹

    Even though I had aquariums since my teens and the pond for decades, I never considered either oxygen or starvation as I should have. However now that I went into the bottom of it, I believe that both those issues came into effect because I have ended up with an overpopulated pond! It is something I didn’t see coming but looking back now as long as I can remember, I have never removed any fish, except the ones that died. They bred each year, growing in numbers and I should have checked this, but I didn’t.

    To me it is obvious that I need to reduce the number of fish drastically and urgently. Please let me have your valued opinions and at the same time advise how to select and remove the doomed ones. I plan to lower the water level and using a net to ‘corner’ them, any other methods?
    I don’t feel guilty any more for doing this, I should have done it before I started losing my beloved big ones, especially my Blackie that loved being relentlessly caressed ………… ☹☹☹

    blackie.jpg

  26. #36
    Junior Member Rank = Fry Aris's Avatar
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    UPDATE
    OK, thank all of you for your interest and valuable help with which now I am close to understanding and resolving the problem.
    First the Oxygen issue. With the filter spraying the water, the waterway and two cascades/falls, I thought I was ok, so I got the Tetra 02 test and here are the results:
    The valued tested at 8 mg/l, however I needed to assess the values in relation to the water temperature as per the chart in the instructions. We are today in a heat wave with max for the month temps, so I measured the water at 24 degrees early in the morning and at 28 degrees at 3:00 pm (the values are Celsius). Doing the numbers instead of 8mg/l I adjusted it down to 6,4mg/l, which I Googled it close to the minimum safe of 6mg/l. Nevertheless, considering that all big ones died in mid June when the weather was cooler, I believe that Oxygen is not the reason the big ones are dying, or at least not the only one.
    Second the feeding issue: The big ones never had enough to eat! Looking carefully now when they feed, I can see the medium/small ones devouring most of the pellets, before the big ones have a chance to eat their needed share! The big ones are not agile enough to scrounge for pellets so they end up eating much less than what they need to!........So it appears I have starved the big ones to death….. ☹
    Even though I had aquariums since my teens and the pond for decades, I never considered either oxygen or starvation as I should have. However now that I went into the bottom of it, I believe that both those issues came into effect because I have ended up with an overpopulated pond! It is something I didn’t see coming but looking back now as long as I can remember, I have never removed any fish, except the ones that died. They bred each year, growing in numbers and I should have checked this, but I didn’t.
    To me it is obvious that I need to reduce the number of fish drastically and urgently. Please let me have your valued opinions and at the same time advise how to select and remove the doomed ones. I plan to lower the water level and using a net to ‘corner’ them, any other methods?
    I don’t feel guilty any more for doing this, I should have done it before I started losing my beloved big ones, especially my Blackie that loved being relentlessly caressed ………… ☹☹☹

    blackie.jpg

  27. #37
    Extreme Koi Member Rank = Kyusai Scamp's Avatar
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    Hi Aris
    as mentioned on my first post you have a lot of Koi, reducing the number will for sure assist in improving the situation, whether its feeding, oxygen or even a water parameter issue - so I think this is a great first step.

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  29. #38
    Junior Member Rank = Fry Aris's Avatar
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    Quote Originally Posted by Scamp View Post
    Hi Aris
    as mentioned on my first post you have a lot of Koi, reducing the number will for sure assist in improving the situation, whether its feeding, oxygen or even a water parameter issue - so I think this is a great first step.
    Thanks SCAMP, I'm already looking out for a suitable net, that I can use in the future as well!

 

 
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