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Thread: Help designing filtration.
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06-04-2020, 11:19 AM #21
Im not aware of any way of doing this.
Using a simple water level theory, the water will always overspill in the filters if the pond water level is higher. The only way it could be done is if the filtration units where completely sealed, can't say I've seen this approach anywhere before.
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06-04-2020, 08:58 PM #22
It’s sad that I’m not getting many other responses from people.
I would really like to hear people’s ideas on best filtration for crystal clear water. I’ve seen many different things. Some people stacking loads of boxes for Bakki showers but I don’t see how they get rid of solids etc.
I could probably just have the nexus stick up into my shed slightly and eat up some of my shed storage space but would still like to hear how well they cope with clearing out solids and ensuring I have crystal clear water
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06-04-2020, 09:45 PM #23
I know it can be a bit frustrating, but there is a lot of info on the forum, you just have to spend time finding it / reading through generally..
For example, I was just looking at a thread with pictures of peoples fish and came across this post about fines on the Nexus....
#212
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06-04-2020, 10:10 PM #24
I’ve been reading quite a bit. Issue I’m finding is I see lots of methods but not many full explanations of how it all works so it’s not really possible for me to design my pond around bits and pieces I read and be sure it’s optimal. Not yet anyway. Maybe I’ll come across more detailed stuff.
I like the ideas of a nexus with a drop in drum filter but I am still trying to find an explanation of what parts I need for that and how I’d go about it and if it works well
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06-04-2020, 10:16 PM #25
On the link I just sent you can see two videos showing the difference adding Jap matting and filter wool to the Nexus 220 made. Further on you will see that RS2000 confirms he has simply added a drop in Draco drum to boost his water clarity.
Why not respond, or drop him a PM and ask him what extra parts were required in his setup? Alternatively, I believe he may have a build thread somewhere from a while back with all the detail in it.
Click on his avatar next to one of his posts and look through his post history to see if you can find it.
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06-04-2020, 10:19 PM #26
Here you go....
Nexus 220 fines issue
https://www.koiforum.uk/water-treatm...es-issues.html
and RS2000 sleeper pond extension thread
https://www.koiforum.uk/pond-constru...extension.html
Hope that helps
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06-04-2020, 10:33 PM #27
That’s very interesting. A sleeper pond may be a lot cheaper for me. Now I need to find out how a sleeper pond would work under ground lol! So much reading to do
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06-04-2020, 10:41 PM #28Freddyboy the legend
"we are water keepers first"
Johnathan
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07-04-2020, 12:37 AM #29
Im not sure, but I'm guessing, create a concrete collar just at ground level to build the sleepers off of. Then dig inside the collar to create more depth and then line it with a box weld liner? Hopefully that thread will have some good details.
And depending on your job, maybe plenty of time to do it?
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Ajm Thanked / Liked this Post
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07-04-2020, 01:32 AM #30
Rs thread is a good one very detailed andikoi has a sleeper pond aswell with windows in that one . If they dont pop up on here just drop them a pm am sure they help any wah they can
Sent from my SM-G973F using TapatalkFreddyboy the legend
"we are water keepers first"
Johnathan
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07-04-2020, 06:30 AM #31
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07-04-2020, 06:58 AM #32
Steve that photo there is my pond.
I run a 2 line system.
Line one bottom drain gravity fed to
Nexus 320 draco drum to pump 15000 Ltd to UV 55 returned to top pond (plants in there )via a shute waterfall
To lower pond
Line 2 skimmer to ultra sieve3 to 8000lph pump to 55 uv. To mid water returns. 2 feet of bottom of pond for circulation
If you type in Google nexus manual. It will tell you in there gravity fed setup and pump
Fed setup. Water levels of pond and and nexus.
I have a drop in draco drum inside my nexus. And the water height alters from the
Stand alone nexus height to the waste tray
Of the draco.
So basically you set the nexus hight to your pond water level as per the manual
Then drop the drum in . It has feet on it that you can set your waste tray to what ever hight suits you. In my case
It is set level with my skimmer water level
So everything is equal.
Forgot to add. First of you take the easy chamber out the nexus inner chamber and disconnect the air line in the central chamber. To fit it . It took me about an hour and a half. No pipework to alter. Play as you go. Type of thing. Easy.
My water is crystal clear. And parameters spot on. 300 lts of k1 and helx media in the outer chamber
If you don t put a draco in. On the fines side of things. People use jap matting in tho out return part. But eventually they get the draco put inside.
Hope this helps
Fred
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07-04-2020, 08:04 AM #33
Thanks for all that. Very helpful. I was confused how the Draco went in. Sounds simple enough.
My nearest land drain would be above the bottom of my pond. Only around 50cm below water level. Will I be able to take my nexus drain and have the pipe go up 50cm to this drain and still be able to flush the waste out?
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07-04-2020, 08:07 AM #34
Yeah still working from home as much as I can as I’m self employed but it’s a hard to make a living these days.
I’ve already dug out part of the pond as I have a basic in ground lined pond. I’d have to fill in some of the pond go create the concrete collar first. Not sure if it’s worth me doing that or build the sleepers up from the base.
Sleepers do work out a lot more expensive than co concrete blocks if I build from the base though.
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07-04-2020, 08:36 AM #35
Mine was all built to run down hill to drains.
Put a hose down say 2 inch pipe. Pour some water in or trickle a hose pipe inside.
And see if it runs to where you want it to run. If not you may need to run into a barrel say and pump the waste out to where you need to go.
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07-04-2020, 08:58 AM #36
Yeah it’s definitely 50cm up from base of nexus so I’ll have to dig a barrel in the ground with a sump.
I’ll do the nexus with the drop In Draco then.
Just need to figure out the cheapest way to build the pond with a window now. Either concrete blocks or sleepers.
I like the idea of sleepers but the sleepers below ground may be an issue
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07-04-2020, 10:02 AM #37
You don’tbuild the sleepers off the base, if they were underground, they’d rot.
They’re normally set off a concrete collar.
The only option for an “affordable” filter below the waterline of a pond is a bead.
There’s a comprehensive thread somewhere where this was discussed maybe last year, when I’ve got time I’ll link it for you.
On an open system, the level of the water in your filter will be level with the water in the pond (ish).
Make allowance for pump draw down and the level of the water in your skimmer which could be slightly lower than that in the pond if you have a waterfall effect over the skimmer.
Don’t be too disappointed about the lack of answers at the moment, some of us have a lot on our plates at the moment for some reason lol
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07-04-2020, 10:06 AM #38
I appreciate the help.
What would you propose I do in my situation.
I already have an unsightly hole in the ground. I want to make it bigger and also make it into two sections one for a small planted water fall and one for the main pond.
How could I back fill the right amount and make the concrete collar over the section that’s already dug?
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07-04-2020, 10:58 AM #39
Also how does one get the sides of the pond dug out perfectly straight to fit a box weld liner?
Using a spade when I dug my current pond the sides are completely uneven it’s crazy. I imagine it be very difficult as if you accidentally knock too much soil out your never going to be able to repack it?
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07-04-2020, 12:30 PM #40
I’ve decided an option for me to do is to move the pond to the complete other side of my garden and build the collar and then dig the hole starting fresh. That may be easier and fill the old pond with all the dirt I dig out.
It just means more manual labour by me 😂
My main concern for that though is how do you get the sides dug out perfectly straight for a box weld liner as chunks of Earth was falling out the sides of my current pond leaving slopes and craters in the pond walls
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