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  1. #1

    Caught the koi bug,

    Hi all.

    As some know iam new to koi keeping and last year built a sleeper built pond with pressurised filter system etc, when I built the pond i didn't think i would become so hooked on the hobby, so Iv decided to go all out and start a new pond build.
    It's in the planning stage, so far it's gunna be a 7500gallon running on two Nexus320+ two bottom drains wall skimmer on a bead, hollow blocked walls fully rebared and fibreglassed.

    Iam gunna put a viewing window in, size 2metre wide 600 high,
    Hope someone can help with the thickness of the window, i was thinking 39mm thick toughen and triple laminated, do people think this is adequate?

    Any pointers greatly appreciated

    I will post progress as i go on

    Thanks Karlos

    Sent from my ELE-L09 using Tapatalk



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  3. #2
    Senior Member Rank = Supreme Champion davethefish1's Avatar
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    Quote Originally Posted by Karlos View Post
    Hi all.

    As some know iam new to koi keeping and last year built a sleeper built pond with pressurised filter system etc, when I built the pond i didn't think i would become so hooked on the hobby, so Iv decided to go all out and start a new pond build.
    It's in the planning stage, so far it's gunna be a 7500gallon running on two Nexus320+ two bottom drains wall skimmer on a bead, hollow blocked walls fully rebared and fibreglassed.

    Iam gunna put a viewing window in, size 2metre wide 600 high,
    Hope someone can help with the thickness of the window, i was thinking 39mm thick toughen and triple laminated, do people think this is adequate?

    Any pointers greatly appreciated

    I will post progress as i go on

    Thanks Karlos

    Sent from my ELE-L09 using Tapatalk
    Tuffex who make a lot of the toughened pond glass will do the calculation for you.

    but dependant on cost i'd err for thicker glass than the minimum spec,
    all pond windows will bow, the amount of bow depends on thickness of glass, span, infinity or fully framed, and depth of water.
    if you want 2m x 0.600m wide visible don't forget an overlap of 50mm as a 2m x 0.600m window will be 1.9m visible x 0.550m
    by the calcs they reccomend 31.5mm 2 x 15mm laminated i think?
    so i'd go slightly thicker for less bow. 39mm 3 x 12mm laminated.
    they want to be toughened, heat soaked, laminated, all polished edges, and dubbed corners.

    another, and more expensive option to consider is low iron toughened glass, as it is optically clear with no green tint in it.
    as the thicker your glass the more of a 'green tint' it will have looking through it.
    but you may need to go even thicker with that, as it is not as strong as standard float glass

    there are also online calcs...

    https://www.tuffxglass.co.uk/residential/pond-glass/

    https://aurello.co.uk/product/pond-g...ss-calculator/
    Last edited by davethefish1; 07-02-2024 at 10:17 AM.

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  5. #3
    Cheers Dave
    Great info I'll look into those links appreciated Caught the koi bug,

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  7. #4
    Hi, I went as near as dam it 2mx1m. And I went with the 33mm. Or like Dave said 39mm would be better.

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  9. #5
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    That is going to be a great size pond Karlos and with 2 x nexus will run well, dont forget it will cost you a fair bit to treat.

    Cant help with glass as dont have a window but as said best to over size.

    I did mine with hollow blocks dry stacked with rebar and infilled with concrete.
    Can talk you through it if you like.
    John

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  11. #6
    Quote Originally Posted by davethefish1 View Post
    Tuffex who make a lot of the toughened pond glass will do the calculation for you.

    but dependant on cost i'd err for thicker glass than the minimum spec,
    all pond windows will bow, the amount of bow depends on thickness of glass, span, infinity or fully framed, and depth of water.
    if you want 2m x 0.600m wide visible don't forget an overlap of 50mm as a 2m x 0.600m window will be 1.9m visible x 0.550m
    by the calcs they reccomend 31.5mm 2 x 15mm laminated i think?
    so i'd go slightly thicker for less bow. 39mm 3 x 12mm laminated.
    they want to be toughened, heat soaked, laminated, all polished edges, and dubbed corners.

    another, and more expensive option to consider is low iron toughened glass, as it is optically clear with no green tint in it.
    as the thicker your glass the more of a 'green tint' it will have looking through it.
    but you may need to go even thicker with that, as it is not as strong as standard float glass

    there are also online calcs...

    https://www.tuffxglass.co.uk/residential/pond-glass/

    https://aurello.co.uk/product/pond-g...ss-calculator/
    Cheers Dave, I've ordered the glass today I've gone with 39mm
    Good links alsoCaught the koi bug,

    Sent from my ELE-L09 using Tapatalk

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  13. #7
    Quote Originally Posted by john1 View Post
    That is going to be a great size pond Karlos and with 2 x nexus will run well, dont forget it will cost you a fair bit to treat.

    Cant help with glass as dont have a window but as said best to over size.

    I did mine with hollow blocks dry stacked with rebar and infilled with concrete.
    Can talk you through it if you like.
    Thanks John, should do the job two 320s.

    Iam undecided what to put on the skimmer line, i was thinking two tempests but open to ideas

    Karlos

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  15. #8
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Are you having more than 1 skimmer Karlos ?

    Tempest sound good but never had one,not thinking of a drum?
    John

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  17. #9
    Quote Originally Posted by john1 View Post
    Are you having more than 1 skimmer Karlos ?

    Tempest sound good but never had one,not thinking of a drum?
    Hi John,
    Just one wide mouth skimmer so, not sure about more just with where the blade is positioned, any advice will be appreciated.

    Am gunna run cetus sieve then two tempests as a module on the skimmer, but iam open to suggestions.

    I've not really thought about a drum.
    I've attached some pics of the pond plan so far

    Thanks Karlos Screenshot_20240208_175129_com.android.gallery3d.jpgScreenshot_20240208_175042_com.android.gallery3d.jpg

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  19. #10
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    My opinion skimmer should be on the return current and the slowest movement and valved.

    So your filter return should make a circular movement down the pond then back towards the skimmer.
    What you have to watch is not too much of your koi food goes down there and wasted

    Vodoo is doing a build at the moment though she hasn't been on for a bit but she is slopping her pond to the end then 2 x bottom drains to settlement and I think its sounds a great idea.
    John

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  21. #11
    This is what am proposing in the bottom, do you think the drains should be at the angle end.

    Yeah I've been watching voodoo videos they are very good with some good ideasScreenshot_20240208_192427_com.android.gallery3d.jpg

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  23. #12
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    I would think they would work well at the narrow end so the flow runs the length of the pond.
    John

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  25. #13
    Quote Originally Posted by john1 View Post
    I would think they would work well at the narrow end so the flow runs the length of the pond.
    Thanks johnCaught the koi bug,, makes sense now.

    I was thinking about the airlines been in the middle of the pond, i assume it doesn't really matter.
    Would you put the skimmer more towards the blade or would the surface disturbance intafere to much with the skimmer?

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  27. #14
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Are you having the blade on a narrow end of the pond if so then I would put the skimmer on the opposite end.

    If the blade is on the middle of the long part then I would think on the opposite corner..
    Either way skimmer must be valved so you can adjust the power of the skimmer to suite the ponds needs.

    Not sure on airlines Karlos as I dont use airated drains.

    Would you not consider Vodoos method as I think that would work really well.
    John

  28. #15
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Dont know how I missed your pics but yes that would be fine.
    John

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  30. #16
    Quote Originally Posted by john1 View Post
    Dont know how I missed your pics but yes that would be fine.
    Caught the koi bug,No problem John, i assume you're meaning wear the drains and skimmer are placed in the pictures also with the fall to the drains in the concrete slab.



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    Falls etc would be fine,skimmer is fine too as long as its away from the blade it will do its job.
    John

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  34. #18
    Quote Originally Posted by john1 View Post
    Falls etc would be fine,skimmer is fine too as long as its away from the blade it will do its job.
    Caught the koi bug, Appreciated, anything you think could help with the build would be greatly appreciated.
    Think am gunna have a run down to the koi build talk on Sunday, should be informative i hope,

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  36. #19
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    Good idea Karlos,where are you ?
    John

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  38. #20
    Quote Originally Posted by john1 View Post
    Good idea Karlos,where are you ?
    Am in Northallerton, it's not bad for me around 30/40 mins
    Easy run straight down a1Caught the koi bug,

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