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Thread: Bottom Drains?
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23-06-2019, 12:19 AM #1
Bottom Drains?
Hi/ How many boottom drains would you need on a 4000 gallon Build? Thank you.
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23-06-2019, 01:47 AM #2
Depends somewhat on the shape, what’s your dims. That’s a big old pond!
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23-06-2019, 03:33 AM #32016 new 6000 gallon pond
https://www.koiforum.uk/pond-construc...ghlight=feline
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Maddog1 Thanked / Liked this Post
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23-06-2019, 01:06 PM #4
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23-06-2019, 01:07 PM #5
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23-06-2019, 09:51 PM #6
I would go with two also.
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23-06-2019, 10:20 PM #7
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23-06-2019, 10:22 PM #8
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23-06-2019, 10:27 PM #9
Two for me also.
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23-06-2019, 10:57 PM #10
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23-06-2019, 10:57 PM #11
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23-06-2019, 10:59 PM #12
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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.
Sent from my iPhone using TapatalkIts always a work in progress
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23-06-2019, 11:27 PM #13
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lee63 Thanked / Liked this Post
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24-06-2019, 12:08 AM #14
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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24-06-2019, 12:37 AM #15
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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24-06-2019, 07:24 AM #16
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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24-06-2019, 08:29 AM #17
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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25-06-2019, 12:02 AM #18
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25-06-2019, 12:03 AM #19
The Daily pond temp thread
Pond still covered, currently 11.6C Been really mild this year as far as pond temps go. ...