Welcome to Koi Forum. Is this your first visit? Register
Results 1 to 14 of 14

Thread: Filter levels!!

  1. #1

    Filter levels!!

    Pulling my hair out Filter levels!!

    Trying to work out the levels before I mix a concrete base.
    At the moment I have the sieve top level with the block work.

    If the water level is at the top of the skimmer opening, the top of the sieve will be approximately 60mm above the water level, the manual says 20mm. I can obviously make the concrete level 40mm lower, but will the water level be correct at the top of the skimmer mouth Filter levels!!Filter levels!!Filter levels!!

    That then brings me to the nexus, which needs to be at another level! (Higher)

    So my plan is to pour the base to the correct level of the sieve then use block or similar to sit the nexus on, to get it to the right level.... Or am I over thinking this?Filter levels!!

    Cheers
    Jay

    Sent from my CLT-L09 using Tapatalk



  2. #2
    Extreme Koi Member Rank = Hassai NickK-UK's Avatar
    Join Date
    May 2015
    Posts
    707
    Thanks / Likes
    693
    My plan is to get within an inch on the base then use a block for my RDF & bio.

    For the Nexus I believe you need the slab at the right level as it's supporting all the weight of the filters. You could easily make a pedestal for each filter as a concrete slab to the right level first - then worry about the filter floor as a separate pour once the formers for the pedestals are removed - that way you can shape the filter floor to a drain in the filter house.
    1700 litres on 50 watts
    Planned 11,777 litres on 58 watts. 1300l anoxic, 4" airlifts, Solum 16, bio.

  3. Thanks jayjt29, dbs Thanked / Liked this Post
  4. #3
    With mine- I have an oase profi drum I'm working on a base lower than I'll need and then lift it with planks to get the right height.

    I might redo a raised base after I've got the height right.

    Sent from my SM-G930F using Tapatalk

  5. Thanks jayjt29 Thanked / Liked this Post
  6. #4
    Thanks for the replies, as the nexus needs to be higher than the sieve, I might the hole base to that level or as near as I can... Then form another level for the nexus to sit on.
    In a way I'm lucky with my garden as it slopes onto woodland, so there is a natural slope for the waste water to flow down.

    Ideally I'd build to forms and concrete them for each filter, but being a building novice, I think it will be easier for me to put down the full base at the sieve level.

    Cheers
    Jay

    Sent from my CLT-L09 using Tapatalk

  7. Thanks dbs Thanked / Liked this Post
  8. #5
    Senior Member Rank = Sansai dbs's Avatar
    Join Date
    Jul 2020
    Location
    East Norfolk
    Posts
    139
    Thanks / Likes
    156
    Jay, so I understood your query on the water height with the opening of the skimmer, have you sussed that as that did confuse me a tad too... I have a sit-in floating skimmer currently, so when I go to a skimmer, I presume the water level is somewhere between the bottom and top of the skimmer mouth, depending on how quick your water turns over... I think I have confused myself now too

  9. #6
    A general question relating to water levels . How far from the top of the pond ie the bottom of the coping stones do people aim for ?

    Sent from my SM-G930F using Tapatalk

  10. #7
    Quote Originally Posted by dbs View Post
    Jay, so I understood your query on the water height with the opening of the skimmer, have you sussed that as that did confuse me a tad too... I have a sit-in floating skimmer currently, so when I go to a skimmer, I presume the water level is somewhere between the bottom and top of the skimmer mouth, depending on how quick your water turns over... I think I have confused myself now too
    Yes that's what I've guestimated at! Filter levels!!Filter levels!! Time will tell...

    Sent from my CLT-L09 using Tapatalk

  11. Thanks dbs Thanked / Liked this Post
  12. #8
    Is the sieve gravity or pump fed? before I had a drum I had two of the same unit as in the picture. they have a wide range for water height, input ( Gravity) but mine suffered because I put it to high and the pump would draw to much water out and suck in air. I found it better to put it lower, had no experience with nexus but as you pull water through the level will drop.

  13. Thanks dbs Thanked / Liked this Post
  14. #9
    Quote Originally Posted by vegeemart59 View Post
    Is the sieve gravity or pump fed? before I had a drum I had two of the same unit as in the picture. they have a wide range for water height, input ( Gravity) but mine suffered because I put it to high and the pump would draw to much water out and suck in air. I found it better to put it lower, had no experience with nexus but as you pull water through the level will drop.
    It's gravity fed, or will be vegeemart59.

    Cheers
    Jay

    Sent from my CLT-L09 using Tapatalk

  15. #10
    Senior Member Rank = Rokusai algarth's Avatar
    Join Date
    Jun 2017
    Location
    Wigan
    Posts
    415
    Thanks / Likes
    392
    If you want to gravity feed both the Cetus sieve and your Nexus then you will need a balance pipe and 2 pumps. Some of the dirty water will always go into your nexus through the balance pipe. It seems pointless to me having a sieve if all the water from the bottom drain is not being filtered by the sieve!!!

    Last edited by algarth; 31-07-2020 at 03:56 PM.

  16. Thanks jayjt29, dbs Thanked / Liked this Post
  17. #11
    Senior Member Rank = Rokusai algarth's Avatar
    Join Date
    Jun 2017
    Location
    Wigan
    Posts
    415
    Thanks / Likes
    392
    Personally i would ditch one of them and go either
    1. Gravity fed to Nexus for both mechanical and biological filtration then pumped through a bead filter, uv and back to the pond
    2. Gravity fed to Sieve for mechanical filtration then pumped through beadfilter, uv back to pond.
    Trying to balance out the Sieve, Nexus and skimmer height is a nitghtmare

  18. Thanks dbs Thanked / Liked this Post
  19. #12
    Cheers Gary, nice speaking to you, finally worked it out with your help.

    For others too.... They height of these skimmers is set by the overflow inside it Filter levels!!

    Sent from my CLT-L09 using Tapatalk

  20. Thanks dbs Thanked / Liked this Post
  21. #13

  22. Thanks jayjt29, dbs, freddyboy Thanked / Liked this Post
  23. #14
    Senior Member Rank = Nanasai Handy Kenny's Avatar
    Join Date
    Sep 2016
    Location
    Livingston Scotland
    Posts
    560
    Thanks / Likes
    804
    I reconfigured my filter area to put in a drum. I wanted the drum to be off the base so that the pressure pump and drum bottom were not sitting in water if there was a problem. So I built the base of the drum pit about 12 inches lower than I calculated I would need, and then built a 12 inch table from decking board and sat everything on that. To give me fine adjustment I can add decking boards under the drum or cut an inch or so off the table legs. When I was finally done I realised that the level of my pond went up and down about 2 inches (due to the drum) so I was able to add a couple of decking boards under the drum to achieve a more suitable height.

    Upshot is that when standing next to the drum it is at a more suitable height for working on as well. Building a concrete base that is actually too high would be a nightmare to fix.

    Kenny

  24. Thanks Graeme, freddyboy, jayjt29 Thanked / Liked this Post
 

 

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT +1. The time now is 03:45 AM. Online Koi Mag Forum
Powered by vBulletin® Version 4.2.3
Copyright © 2020 vBulletin Solutions, Inc. All rights reserved.

vBulletin Improved By vBFoster® (Lite Version), © UltimateScheme, Ltd.