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  1. #1

    Help with options for pump fed 10k litre koi pond .

    Hi ,

    Right have a Koi pond that is planted up with lillies and rushes etc etc and i want it that way always .

    But we have had it years but never really go to grips with a proper filter system to try and keep it reasonably clear always clears then goes a pea soup or is very murky with muck . Currently have a kockney koi 4 bay filter sytem on it and then a self made trickle tower system for nitrates into a top pond and then down a waterfall into the main pond . Use to have a UV but always found it was useless as the quartz sleeve would muck very quickly and render it useless or damp would get in the stand alone unit and fry the electrics .


    We have rushes planted in aquatic soil and also lillies the same with big stones on top it has NO BOTTOM DRAIN and im not fitting a retro drain as i cant dig near the pond to have a gravity fed system it has to be pump fed all above ground .

    My plan is this spring to empty the pond pop the fish in a temp paddling pool ( large ) and clean it spotless and replant the plants into just gravel no soil what so ever . to help with the amount of muck in the pond .

    Im doing alot of reading and where i use to have the UV infront of the main filter im reading now that that is wrong ? , didnt the train of thought years ago be that it helped the algae clump together so the filter then took it out , but im reading now its better after all the filtering system is this right .

    My thoughts are to go with a Nexus 220 but if the pond goes the same way again im wanting to put a pre filter infront of the nexus , if i do how do i do this as i would need a sealed unit on the pre filter to be able to carry the water forward onto the nexus as remember its pump fed by a low wattage 10kLPH jeboa .

    Then im reading its better to have a sieve after a nexus as the nexus will get the big stuff and the sieve the finer , if thats correct can i have a sieve and a nexus on the same level ? .

    Then people are telling me about tempests .

    Im basically a bit confused on what i should put where , i know im going to need a 55w UV and im hoping that will be complete with a nexus or even an EAZY pod , dont really want a standalone UV , always had issues with them . Im not after an ultra clear pond as i believe in fish having furniture in their home , fish wiithout plants is akin to me as putting a bloke in a straight jacket in a padded cell . But i would like some sort of transparency to the pond , as it is now its just mucky as to much crap on the bottom and to much cleaning needed on the kockny koi system as the taps dont empty the crap good enough .

    Hoping for some help of any sort . 287058324_10166213324730414_351213996738620454_n.jpg347414480_255212487076608_8933426027959306975_n.jpg


    The bridge i bought for 75 absolute bargain and ive replaced the decking and hand rails already just needs a lick of paint .



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  3. #2
    Again im not after the pristine pond as to many bushes ( that need cutting ) and flowers and conifers to close to pond , i just want some clarity , would be nice to see the bottom which at deepest part under bridge is 4 foot in some sort of hazy way lol .

    There isnt a lot of fish in there but there is a couple of big ones plan is to sell some off keep a couple i like and buy some smaller quality koi and grow on .

    The filters would go behind the spotted laurel bush on the right as just to the left of that slightly behind is a small top pond containing 2 proper tench .

    how the bridge is now

    pond 3.jpg

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  5. #3
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    Sounds like you are confusing pump fed and gravity fed set ups in what you have been reading and then thinking of doing I think.

    You've got to go pump to a filter then gravity return to the pond with pump fed. If you are thinking of using a Nexus or Eazy Pod then the only way you can put a sieve is between the pump and them but it will need to be mounted high enough to gravity feed the filter which also has to be high enough to gravity feed back into the pond. Putting a sieve after a Nexus or Eazy Pod will be a total waste of time as what comes out of the filters will be too small for the seive to be able to catch. As for where a UVC should go, it's got to go before the Nexus or Eazy Pod as it needs to be pumped through. You could get both of those filters with a built in UVC. You could go pump, bead filter, UVC, Nexus or Eazy Pod then gravity return to the pond. I would always go with fitting a UVC and then you have the option to turn it on or off as required if your water goes green.

    Personally I wouldn't put gravel in the pond unless you can seal it well enough to guarantee it will never come out of where it's put as sooner or later the fish will spread it all over the floor of the pond and it will get drawn into the pump. I made that mistake and was finding bits of gravel in the filters for years afterwards. Fortunately it didn't damage the pumps. You could use a retro bottom drain with a pump in the pond with the pipework coming off the pump and over the top of the pond somewhere it's not going to look too obvious.

    Where you are reading about having a UVC after the filters could be on a gravity system as it would then have the pump mounted in front of it to push through it and back to the pond. Gravity systems generally have to have all the filters between the bottom drain and the pump mounted at the same height so the water level in them is the same as it is in the pond. After the pump you can have them mounted higher so they can gravity return to the pond.
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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  7. #4
    Quote Originally Posted by Frimley Koi keeper View Post
    Sounds like you are confusing pump fed and gravity fed set ups in what you have been reading and then thinking of doing I think.

    You've got to go pump to a filter then gravity return to the pond with pump fed. If you are thinking of using a Nexus or Eazy Pod then the only way you can put a sieve is between the pump and them but it will need to be mounted high enough to gravity feed the filter which also has to be high enough to gravity feed back into the pond. Putting a sieve after a Nexus or Eazy Pod will be a total waste of time as what comes out of the filters will be too small for the seive to be able to catch. As for where a UVC should go, it's got to go before the Nexus or Eazy Pod as it needs to be pumped through. You could get both of those filters with a built in UVC. You could go pump, bead filter, UVC, Nexus or Eazy Pod then gravity return to the pond. I would always go with fitting a UVC and then you have the option to turn it on or off as required if your water goes green.

    Personally I wouldn't put gravel in the pond unless you can seal it well enough to guarantee it will never come out of where it's put as sooner or later the fish will spread it all over the floor of the pond and it will get drawn into the pump. I made that mistake and was finding bits of gravel in the filters for years afterwards. Fortunately it didn't damage the pumps. You could use a retro bottom drain with a pump in the pond with the pipework coming off the pump and over the top of the pond somewhere it's not going to look too obvious.

    Where you are reading about having a UVC after the filters could be on a gravity system as it would then have the pump mounted in front of it to push through it and back to the pond. Gravity systems generally have to have all the filters between the bottom drain and the pump mounted at the same height so the water level in them is the same as it is in the pond. After the pump you can have them mounted higher so they can gravity return to the pond.

    Thanks for that helps quite a bit .

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  9. #5
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    Quote Originally Posted by AlanPeach View Post
    Thanks for that helps quite a bit .
    Good luck Alan.

    Any other questions just ask
    ________________________________________________
    All we ever wanted was everything,
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    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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  11. #6
    Can i ask if i was putting a sieve before a nexus 220 , a bit that confuse me is the exit from the sieve would it go gravity wise into the top part of the nexus with the lid totally off or cut into to accommodate or would it go into the normal entrance on the nexus via the normal pipework .

    daft question i know but i cant get my head round it .

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  13. #7
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    No problem Alan.

    What you want is a pump fed sieve not a gravity fed seive OK.

    All you need to do then is mount the sieve high enough to be able to gravity feed the 220 and then just connect the outlet of the sieve to the inlet of the 220. That's what I did with my seive Eazy Pod set up and am also doing the same again on my current pond build. The only down side is you have to have the seive and the 220 high enough to feed from the pump and then back to the pond as from memory the outlet of the 220 is quite low down so the sieve has to sit quite high up to work. I'll see if I can find some photos of my set up to show you later today.
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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  15. #8
    Quote Originally Posted by Frimley Koi keeper View Post
    No problem Alan.

    What you want is a pump fed sieve not a gravity fed seive OK.

    All you need to do then is mount the sieve high enough to be able to gravity feed the 220 and then just connect the outlet of the sieve to the inlet of the 220. That's what I did with my seive Eazy Pod set up and am also doing the same again on my current pond build. The only down side is you have to have the seive and the 220 high enough to feed from the pump and then back to the pond as from memory the outlet of the 220 is quite low down so the sieve has to sit quite high up to work. I'll see if I can find some photos of my set up to show you later today.
    This all sounds very doable as the filter will be put behind the spotted laurel you can see on the rockery behind the pond in the pics on the right hand side so its no problem getting the height really . What i have to do though is make a sound concrete base for the filters at the side of the top pond , the top pond is only a small preformed plastic pond which feeds the waterfall in the pic if you can see the waterfall .

    Pics would be great ands thanks very much for this you are REALLY helping !! .

    Thanks

    Alan

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  17. #9
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    https://www.koiforum.uk/pond-constru...e-pond-16.html

    Hopefully that's the right link should be page 16 of my build thread. Look for post number 312 as that has photos of my sieve and Eazy Pod setup. Not sure how obvious the outlet of the Eazy Pod is to see in those photos but the pond is about 150mm lower than it I think?

    My pond is up out of the ground about 600mm so it's making everything sit much higher than it would if it was at ground level like your pond is.

    Not sure if I read your first post correctly but I think you were going to use a 10K LPH pump? I'd go for a 20K LPH variable speed pump as you're going to have a fair amount of flow restrictions plus you don't really want to be running a pump flat out. With the setup you're thinking about I'd be running a 20K LPH pump at 50% as a starting point and then you have room to go up or down as required. It's quite often more economical to run a bigger pump at 50% than a smaller one at 100% plus the pump isn't working as hard so in theory it should last longer, hopefully.
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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    I'm running an Evolution Aqua Vario 20K LPH on the main filter system and an Aqua Forte 10K LPH variable speed pump on the skimmer line which has the sieve and Eazy Pod on as I don't need as much flow through that compared to the main filter system.

    There's a few more photos on there if you go further back I think?
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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  21. #11
    Just looked very helpful , one thing i have seen straight away is that the bottom of the sieve has to be above the top of the nexus and all pipework the same width , so i can pop the nexus in and then get breeze blocks stacked to pop the sieve on . Any sieves you recommend or is it cetus all the way seems pricey that does for what it is , i notice you dont have a cetus .

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  23. #12
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    Annoyingly I had a Cetus that I bought from someone on here a few years ago and it sat in the shed for years as I could figure out the best way to put it into my system so sold it. About a year or two later I started on my quarantine tank which was gravity fed and could have used it on that and saved some money

    I think the sieve I have now got is an Air Aqua pump fed one. There aren't many sieves that are pump fed as most are gravity fed although the Cetus is convertible from pump to gravity fed as easy as a standard Eazy Pod can be. Not sure how easy the 220 is to convert from gravity to pump fed or the other way but I think it's possible?

    I'm not sure if the Air Aqua sieve is 3" or 4" out without looking at it again but I know the Eazy Pod is 3" in and out and you just use flexi rubber boot adapters to convert from 3" to 2" or 4" when connecting them up. Something is making me think the 220 is 4" in and possibly 2" out? I don't think it's 3"? I think the Cetus could actually be 4" in which would mean the 220 is also 4" in as they are both Evolution Aqua and designed to work together so makes sense they have the same size fittings?

    The pipework on my new build is 2" and 3" plus there's a UVC with a bypass system which is 1.5" and I think some of the wastes could be 1.5"? It's been a little while since I last did anything on it as the weather changed and other things happened so I stopped working on it until things picked up.
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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  25. #13
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    The sieve doesn't have to be as high as I've got it as that was just how the existing brick work was. As long as the outlet of the sieve is a bit higher than the inlet of the Eazy Pod or 220 in your case it will work OK. The higher up the sieve outlet is compared to the inlet of what it's feeding the better the flow rate between them should be as gravity has longer to work on things if that makes sense.
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

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    For people who take things as literally as I do, I would add that inlet of the Eazy pod is lower than the water level inside the Eazy pod when it is running so you need to make sure that the sieve outlet is above that water level otherwise the sieve screen will sit in water.

  28. #15
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    Quote Originally Posted by PhilN View Post
    For people who take things as literally as I do, I would add that inlet of the Eazy pod is lower than the water level inside the Eazy pod when it is running so you need to make sure that the sieve outlet is above that water level otherwise the sieve screen will sit in water.
    Yes that's why I went with mounting my sieve well above the top of the Eazy Pod so it was getting as much help from gravity as possible without making the sieve too high up so I couldn't get into the top of it to clean it.

    I had the overflow for the sieve recirculated into the Eazy Pod so it could never dump water without me knowing. I seem to remember the guy I bought the sieve from had the waste going back into the pond because of the filter he had the other side of it. At least with the waste going through the Eazy Pod it was getting filtered before it went back into the pond so thought it was a better way to do it with my set up.
    ________________________________________________
    All we ever wanted was everything,
    All we ever got was cold,
    Get up, eat jelly, sandwich bars and barbed wire,
    Squash every week into a day.

  29. #16
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    I'd also second going for a pump fed sieve too.

    Personally, I think sieves are the next best thing after drums for mechanical filtration.

    If you can wait a bit, you can normally find a sieve secondhand for a good price.

    You could buy an Amalgam UV and drop that in the dirty side of the sieve. They are pricey, but very effective and last a fair while. As a Safety feature I'd have it on a timer, and it only comes on over night. That way you won't expose your eyes to UV if you go to look in the sieve and forget to turn the UV off.

    In terms of bio filtration, instead of an eazypod or nexus, why not just make your own moving bio filter. They are so easy to make and cheap but effective!

    All you need is a large plastic container (I used a black Wham Box), stick an inlet on it from the sieve (this could simply be a hole cut in the lid and have the sieve out let drop vertically into it), and an outlet (you need to make a grill over the outlet to stop the media flowing back into the pond). Chuck a few air stones in it and bobs your uncle.

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