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Thread: Bottom Drains?

  1. #1

    Bottom Drains?

    Hi/ How many boottom drains would you need on a 4000 gallon Build? Thank you.



  2. #2
    Extreme Koi Member Rank = Sansai Poochops's Avatar
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    Depends somewhat on the shape, what’s your dims. That’s a big old pond!

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  4. #3
    Moderator Rank = Supreme Champion Feline's Avatar
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    I would go for 2

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  6. #4
    Quote Originally Posted by Poochops View Post
    Depends somewhat on the shape, what’s your dims. That’s a big old pond!
    Hi/ Thanks for the reply I was thinking of doing a rectangular shape pond may be 12.5'x10'x5' deep.

  7. #5
    Quote Originally Posted by Feline View Post
    I would go for 2
    Thank you for your reply.

  8. #6
    Senior Member Rank = Kyusai Sim's Avatar
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    I would go with two also.

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  10. #7
    Quote Originally Posted by Sim View Post
    I would go with two also.
    Thank you for your reply!

  11. #8
    Extreme Koi Member Rank = Supreme Champion Davej's Avatar
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    For me it would be two but it is somewhat dependent on your filters and aspirations?

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  13. #9
    Two for me also.

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  15. #10
    Quote Originally Posted by Davej View Post
    For me it would be two but it is somewhat dependent on your filters and aspirations?
    Thank you for your reply,at the moment I'm thinking that I might go with a Drago 25 and then into 1 large moving bed or 2 small ones

  16. #11
    Quote Originally Posted by Doitsusanke View Post
    Two for me also.
    Thank you for the reply!

  17. #12
    Extreme Koi Member Rank = Grand Champion lee63's Avatar
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    You probably could get away with 1 as i may be wrong but believe a 4” drain has around a 6ft draw radius meaning one should be good for a 12ft diameter (6ft out and around from centre). I may be well off with that though but it seems to be stuck on one of my little back of the mind shelves for some reason ha ha.
    Having said that i would probably look at putting 2 in personally to ensure a good pull on the bottom as one would be at its recommended limit. It will depend on how your planning to filter and set it up though.


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  19. #13
    Quote Originally Posted by lee63 View Post
    You probably could get away with 1 as i may be wrong but believe a 4” drain has around a 6ft draw radius meaning one should be good for a 12ft diameter (6ft out and around from centre). I may be well off with that though but it seems to be stuck on one of my little back of the mind shelves for some reason ha ha.
    Having said that i would probably look at putting 2 in personally to ensure a good pull on the bottom as one would be at its recommended limit. It will depend on how your planning to filter and set it up though.


    Sent from my iPhone using Tapatalk
    Thank you for the reply, Think what your saying is spot on. Read on one site, that 10' base would be ideal for one 4" drain but you could push it to 14' foot base to the max Limit.

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  21. #14
    Senior Member Rank = Nanasai Handy Kenny's Avatar
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    Maddog1,

    Don't overthink this. The draw depends on the throughput of your filters/pump, an incline on the bottom towards the bottom drain helps stuff gravitate in the right direction, the koi help move stuff around on the bottom, if you are desparate to get stuff out of the pond water you will be having an RDF (cos if you have anything else the muck is still in the water and worse still within a stream of water breaking it up). The shape of your pond can help, where the water returns to your pond can help e.g. an organically shaped pond 40 foot long and 4 foot wide with an incline on the bottom where the input is at one end and output at the other would be very efficient. Directional nozzles in the walls of your pond inclined to the pond bottom can help with quiet areas.

    What doesn't help is an in wall skimmer, gravity fed to your filter as this reduces the flow through the bottom drain.

    Kenny

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  23. #15
    Quote Originally Posted by Handy Kenny View Post
    Maddog1,

    Don't overthink this. The draw depends on the throughput of your filters/pump, an incline on the bottom towards the bottom drain helps stuff gravitate in the right direction, the koi help move stuff around on the bottom, if you are desparate to get stuff out of the pond water you will be having an RDF (cos if you have anything else the muck is still in the water and worse still within a stream of water breaking it up). The shape of your pond can help, where the water returns to your pond can help e.g. an organically shaped pond 40 foot long and 4 foot wide with an incline on the bottom where the input is at one end and output at the other would be very efficient. Directional nozzles in the walls of your pond inclined to the pond bottom can help with quiet areas.

    What doesn't help is an in wall skimmer, gravity fed to your filter as this reduces the flow through the bottom drain.

    Kenny
    Hi Kenny/ Thanks for the detailed reply! There's a lot of very good information there! I Like the idea of the nozzles in the wall. And I would have over looked the very good point you make about the in wall skimmer plumed into the bottom drain. Which thinking about it makes good sense! Thank you.

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  25. #16
    Extreme Koi Member Rank = Supreme Champion john1's Avatar
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    I have a 3000 gal 4mtr x 3 mtr x 4ft deep one standard drain to a draco 25.
    Works fine but any bigger and it would be two drains as I think it is at its max.
    As said depends on the length and width and not so much the depth.
    John

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  27. #17
    Senior Member Rank = Grand Champion andikoi's Avatar
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    same size as my old pond but i was 6ft deep and i had 1 aerated bd,any bigger i would go 2 but if you have some well placed underwater returns then 1 will work,,,,andi

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  29. #18
    Quote Originally Posted by john1 View Post
    I have a 3000 gal 4mtr x 3 mtr x 4ft deep one standard drain to a draco 25.
    Works fine but any bigger and it would be two drains as I think it is at its max.
    As said depends on the length and width and not so much the depth.
    Thank you John.

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  31. #19
    Quote Originally Posted by andikoi View Post
    same size as my old pond but i was 6ft deep and i had 1 aerated bd,any bigger i would go 2 but if you have some well placed underwater returns then 1 will work,,,,andi
    Thank you Andi

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