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  1. #21
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
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    Quote Originally Posted by RoyLittle0 View Post
    PMSL, and how would you know anything about that have you been looking over the other half's shoulder
    You cheeky fucker!!!! I do the dished she does the cooking

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  3. #22
    Appreciate the help here and am doing a bit of searching on the net. So a gravity fed system means the filter top must be at the pond water top level? Not sure how I could do this as the pond is entirely below ground. Are all these filter issues just because it’s for carp rather than goldfish?

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  5. #23
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    Quote Originally Posted by G21 View Post
    Appreciate the help here and am doing a bit of searching on the net. So a gravity fed system means the filter top must be at the pond water top level? Not sure how I could do this as the pond is entirely below ground. Are all these filter issues just because it’s for carp rather than goldfish?
    Yes the water level in a gravity fed system has to be the same in the filters as it is in the pond basically until you get to the pump then you can go higher up if you have something like a shower or sealed type filter.

    People with ground level ponds just dig a filter pit and then you can get the filters at the correct heights.

    Koi are generally much bigger than goldfish so need more filtration to keep the water parameters within a safe level for the fish. Bigger fish means more food which means more waste produced.

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  7. #24
    Back filling with concrete of up to 4-5 inches should produce a strong enough wall.


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  9. #25

    Bottom Drain

    I am currently digging my first ever pond. I had looked into bottom drains but all the Youtube videos etc looked really complicated and talked about settlement tanks etc. Anyway I decided that it was beyond me so I have bought a good old fashioned pump and pressure filter which apparently will send the water up to the top of the cascade that I am also building. I only plan on keeping max 5 Koi and the pond is 9000 litres so I am assuming this will be OK
    Attached Images Attached Images

  10. #26
    Hate to say it but I think you’ll get the same response as me. The more I searched the more I found saying pressure filters are pants which has left me gutted and back to square one. At the moment I’m just looking into pumped versus gravity fed and gravity seems to win every time although I’m struggling to see how I can achieve it now in the space I have so I’m thinking my compromise may be a pump fed eazypod auto then a separate pump for my feature or scrap the whole pond idea and just have the water feature. Good luck

  11. #27
    I may start with 3 fish and see how it goes - I would understand if I was getting 30 fish.I'm just going to take the risk and make the first timer mistakes that other people have made. I have also read that many people have pressurised filters and their Koi and ponds are doind fine.

  12. #28
    You sound much more positive than me a the moment have spent most of the day researching to the point of just saying fuck it and fill it in. Am same on not planning loads of fish maybe half dozen max but lucky enough I hadn’t actually bought the filter yet. Anyway wait for a response from the experts I was ready to order a pressure filter myself 24 hours ago so I know very little.

  13. #29
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    You can try a pressure filter and pump fed system but you will realise that you will need to upgrade your filter or add to it to keep up with the growth rate of the Koi.

    You'd be better off with a small pond using an Eazy Pod. Probably better to go with a standard one not the automatic one. I'm only pump fed using an Eazy Pod but have still had to add to that to get the clarity I would like. Took a while but it's getting there now.

    A standard Eazy Pod is cheaper and has the flexibility of being changed to gravity fed if required in the future or if you sell it on the same applies. A few people use a gravity fed Eazy Pod on a skimmer system as they think it is too small for a Koi pond as a main filter but mine is working fine.

    Pressure filters don't have a big enough bio capacity to deal with Koi and you will end up cleaning them on a very regular basis.

    A fair few Eazy Pods come up on Ebay so have a look on their maybe?

    Any second hand filters should be properly cleaned using something like Potassium Permanganate? referred to as PP.

    Gravity fed is the best option but pump fed can be made to work fairly well too if you are prepared to do the extra cleaning etc.

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  15. #30
    Senior Member Rank = Jussai Alburglar's Avatar
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    Quote Originally Posted by Frimley Koi keeper View Post
    Maybe a photo or a drawing of those suggestions would be useful.
    I was considering it with my tub, but went for a BD in the end.
    ... For a skimmer just spin the tube round to point to the surface.
    2660 Gallons. 4" Bottom Drain and Skimmer. Draco Solum 16 Drum. Anoxic Filtration. Air lift returns.

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  17. #31
    Quote Originally Posted by Frimley Koi keeper View Post
    You can try a pressure filter and pump fed system but you will realise that you will need to upgrade your filter or add to it to keep up with the growth rate of the Koi.

    You'd be better off with a small pond using an Eazy Pod. Probably better to go with a standard one not the automatic one. I'm only pump fed using an Eazy Pod but have still had to add to that to get the clarity I would like. Took a while but it's getting there now.

    A standard Eazy Pod is cheaper and has the flexibility of being changed to gravity fed if required in the future or if you sell it on the same applies. A few people use a gravity fed Eazy Pod on a skimmer system as they think it is too small for a Koi pond as a main filter but mine is working fine.

    Pressure filters don't have a big enough bio capacity to deal with Koi and you will end up cleaning them on a very regular basis.

    A fair few Eazy Pods come up on Ebay so have a look on their maybe?

    Any second hand filters should be properly cleaned using something like Potassium Permanganate? referred to as PP.

    Gravity fed is the best option but pump fed can be made to work fairly well too if you are prepared to do the extra cleaning etc.
    Is there an issue with the auto model apart from its inability to be converted from gravity to pump and the price as i quite liked the idea of it cleaning itself? and what did you add to yours to improve it? Theres an auto listed on ebay now not far from me.
    Ive watched wrightys videos on you tube and seen his home made skimmer, it looks like a solution I could use that would also power my water feature.

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  19. #32
    OK, goldfish it is then lol

  20. #33
    Senior Member Rank = Jussai Alburglar's Avatar
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    Quote Originally Posted by G21 View Post
    Appreciate the help here and am doing a bit of searching on the net. So a gravity fed system means the filter top must be at the pond water top level? Not sure how I could do this as the pond is entirely below ground. Are all these filter issues just because it’s for carp rather than goldfish?
    Koi produce alot more crap. They are huge beasts, the size of an average dog. Imagine 6 dogs doing a turd in a 2metre box every day.
    The idea of gravity fed is that it avoids a pump until the water is clean. The pump mashes the 6 dog shits and blends it into the water, which makes them very hard to remove. If you have a gravity feed to a mechanical filter, it removes the 6 dog shits whole. You then pump the clean water back to the pond.

    If you bury the mechnical filter in the ground, like a sieve you can then pump to above ground after that.

    ... And yes I am very chuffed with that analogy.
    Last edited by Alburglar; 24-05-2020 at 08:31 PM.
    2660 Gallons. 4" Bottom Drain and Skimmer. Draco Solum 16 Drum. Anoxic Filtration. Air lift returns.

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  22. #34
    Very eloquently put and clearly understandable thanks. Am going to give my builder a ring tomorrow and see how it easy to drop the floor level in the shed i had planned on the side where the pipes are and put a bottom drain in.

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  24. #35
    Quote Originally Posted by Alburglar View Post
    Koi produce alot more crap. They are huge beasts, the size of an average dog. Imagine 6 dogs doing a turd in a 2metre box every day.
    The idea of gravity fed is that it avoids a pump until the water is clean. The pump mashes the 6 dog shits and blends it into the water, which makes them very hard to remove. If you have a gravity feed to a mechanical filter, it removes the 6 dog shits whole. You then pump the clean water back to the pond.

    If you bury the mechnical filter in the ground, like a sieve you can then pump to above ground after that.

    ... And yes I am very chuffed with that analogy.
    Excellent description mate, had me chuckling as I read it New first time pond advice


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  26. #36
    Senior Member Rank = Grand Champion RoyLittle0's Avatar
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    As an option for a retro bottom drain in 4"

    Dracodrum Bottom Drain pond filter solution
    4600 Gallon Concrete Block and Fiberglass
    2100 mm x 710 mm Infinity Window 32mm thick glass
    2 x Aerated Bottom Drains and Skimmer
    Filtreau HiFlow 30 Drum Filter
    Bio Chamber - 140 litres K1
    Bakki Shower - 30 KG Sakura Far Infrared Media
    2 x 18,000 lh pumps
    Heated from house boiler through a heat exchanger
    Idealseal MS290

    My Pond Build

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  28. #37
    Quote Originally Posted by Alburglar View Post
    Koi produce alot more crap. They are huge beasts, the size of an average dog. Imagine 6 dogs doing a turd in a 2metre box every day.
    The idea of gravity fed is that it avoids a pump until the water is clean. The pump mashes the 6 dog shits and blends it into the water, which makes them very hard to remove. If you have a gravity feed to a mechanical filter, it removes the 6 dog shits whole. You then pump the clean water back to the pond.


    If you bury the mechnical filter in the ground, like a sieve you can then pump to above ground after that.

    ... And yes I am very chuffed with that analogy.

    So a bottom drain looses most of its benefit on any pump fed system?

  29. #38
    Quote Originally Posted by RoyLittle0 View Post
    As an option for a retro bottom drain in 4"

    Dracodrum Bottom Drain pond filter solution
    Thanks for that, not pretty though are they. I think if the builder says we can drop the floor level in the shed 600mm to accommodate a gravity eazypod then cutting the proper one in wont seem so bad. Otherwise it will be a pumped system and just 2 fish to start off and see how it go's from there.

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  31. #39
    Senior Member Rank = Jussai Alburglar's Avatar
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    Quote Originally Posted by G21 View Post
    So a bottom drain looses most of its benefit on any pump fed system?
    No.
    Gravity fed through filters, then Pump back to pond. So:

    The pump is after the filters. It is constantly trying to empty the filter. Gravity constantly tries to refill what is being pumped out, which drags the water through the bottom drain and through the filters without mashing it up.
    First filter is mechanical 2nd is biological.
    Last edited by Alburglar; 24-05-2020 at 10:25 PM.
    2660 Gallons. 4" Bottom Drain and Skimmer. Draco Solum 16 Drum. Anoxic Filtration. Air lift returns.

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  33. #40
    Have a look at an airlift. It is easy and cheap to run. Allows you to take the dirty water coming from the pond higher so your filter can be above the water level.

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