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    Thread: Sieve Vs Settling chamber

    1. #1
      LTHYNE is offline Senior Member
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      Sieve Vs Settling chamber

      Can someone tell me what the difference between a large settling chamber like this one (https://westernmass.craigslist.org/f...504956108.html) on a bottom drain and a cetus sieve?



      Looking at both options for new pond setup.

      Thanks,

      LT

    2. #2
      Grumpy's Avatar
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      Many things to consider, but a significant difference: with a settling chamber, the waste remains in the pond water waiting for someone to come along and clean it; with a cetus sieve the waste is removed from the pond water as soon as it reaches it.

    3. #3
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      Well yes kinda. A sieve keep most of the waste from being in the water column. More frequent cleaning on the sieve is better as it allows more of the debris to remain out of the water column

    4. #4
      LTHYNE is offline Senior Member
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      If I can get a large chamber for a couple hundred bucks over a cetus at a thousand, I am getting same functionality with a little bit more weekly cleanup? I dont need GIN water...Just want clean water without breaking the bank...I also a 16000 aquadyne bead filter.......Thinking of adding this chamber over the sieve and then inserting a shower on the egress.

    5. #5
      BWG is offline Senior Member
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      New Cetus sieve will flow 4750 GPH. The vortex in the photo will do best at collection around 2000 GPH and below and will flow a lot more but will start passing considerably more solids downstream as the flow rate increases. Cetus sieve will have a smaller footprint. The vortex will work with a low head airlift system and the Cetus will not. Less maintenence cleaning with the Cetus and it will collect all solids bigger than the screen rating. Vortex even with brushes installed inside not as efficient collecting solids.

    6. #6
      LTHYNE is offline Senior Member
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      Thanks for response...flow rate was my biggest concern....time to hit the drawing board again ;-(

    7. #7
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      Also consider this. No bead filter needed.
      Attached Images Attached Images  

    8. #8
      LTHYNE is offline Senior Member
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      But i already have the one year old bead filter....

    9. #9
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      Quote Originally Posted by LTHYNE View Post
      But i already have the one year old bead filter....
      The ultra sieve 3 to the bead filter would be good..cetus are cheaper but the ultrasieve is much better i feel and handles higher flow rates than the cetus with the same footprint.

    10. #10
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      Quote Originally Posted by LTHYNE View Post
      But i already have the one year old bead filter....
      You also would need to add several thousands of dollars for the RDF....

      I think the sieve will work well. The maintenance between a SC and sieve is night and day. If the Cetus flow rate works
      I think you'd be good to go.
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    11. #11
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      Quote Originally Posted by icu2 View Post
      You also would need to add several thousands of dollars for the RDF....

      I think the sieve will work well. The maintenance between a SC and sieve is night and day. If the Cetus flow rate works
      I think you'd be good to go.
      I agree. After talking to many at the koi show. I went from a zakki sieve to the blue eco rdf and it was night and day as well. Regardless of end media or shower setup etc.. Good filtration is key. For us here in cali out power is high and bead filters are power hogs. I talked to richsaw, and many other people and it is pretty amazing what my pond with rdf is doing. Huge fish load and perfect polished water with low nitrate level. I try to stress lower nitrates for better koi health

    12. #12
      malatu is offline Supporting Member
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      I was in the same boat as you a few years back. I had a settlement chamber but after learning more about the advantages and disadvantages compared to a sieve, I returned it and used the Ultrasieve. I use a bead filter after it the sieve. If I were doing it now, I'd probably consider some of the other alternatives out there. The RDF certainly looks interesting.

    13. #13
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      From a cost-benefit perspective, I am very glad to have my UltraSeive III units with optional 200micron screens. If I were starting a new pond, I would definitely budget for an RDF as the mechanical stage.

    14. #14
      tbullard is offline Senior Member
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      Other than the points that have been mentioned (size, effectiveness and flow rate) there is also the time needed to clean. With a sieve you just need to open the waste valve and maybe spray the screen down with a hose but you won't ever need to disrupt the flow of water thru the system. With the SC you will need to turn off the pump, drain the SC, Hose out the remaining waste, then wait for the pond to refill with with water so that the level is adequate to supply the pump. If your refilling with a hose you run the chance of forgetting to turn off the water and flooding the pond with chlorinated water.

    15. #15
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      Also a settling chamber works on particles with negative bouyancy. What if the particles have neutral to positive bouyancy? An SC will have little to no effect. Way back 20+ years ago Waddy had massive vortex systems for his huge personal pond. He thought the SCs were doing a great job. Then Evolution Aqua showed him "The Answer" that has a 100micron screen. He could not believe how much crap The Answer was blocking that his passive large SC was not capturing.

      Bottom line, nothing replaces a barrier as a mechanical filter. The questions are: what level of filtration do you need, how difficult is the barrier to clean and maintain, how much space does the barrier occupy, and how much does it cost to purchase and operate.

    16. #16
      LTHYNE is offline Senior Member
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      Would people recommend the UltraSeive III over the Cetus Sieve? I once had the first generation cetus and had many problems with the gasket.....

    17. #17
      Marilyn's Avatar
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      I would go Ultrasieve over Cetus. I had the Cetus and had issues with the bellows. It never truly resolved though I know people have developed workarounds for it. From what I've heard, people aren't having many issues with Ultrasieves.
      Still learning as I go but y'all can call me Marilyn

      I'll say something when I feel I have something worth saying. I'm not a fan of flapping my lips just because they are there.

    18. #18
      LTHYNE is offline Senior Member
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      Is there a recommend dealer on this forum who wants to sell me one?

    19. #19
      Marilyn's Avatar
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      Quote Originally Posted by LTHYNE View Post
      Is there a recommend dealer on this forum who wants to sell me one?
      I'm sure all the dealers here that sell them would like to have you as a customer. If I were in the market for one, I would post a thread in the Trader section asking for their best price for an UltrasieveIII shipped to your zip code. They can pm you their best price.
      Still learning as I go but y'all can call me Marilyn

      I'll say something when I feel I have something worth saying. I'm not a fan of flapping my lips just because they are there.

    20. #20
      MCAsan's Avatar
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      Any dealer can order you one from Water Landscape Supply who does the importation and distribution in the States. It is WLS who will likely ship to you from their warehouse.

      Had two Cetus and replaced them with two US3 sieves years ago. Upgraded my US3 units with lids as they sit outside and also upgraded them from 300mm screens to 200mm screens. One of the best things I did for my filter pit.
      Last edited by MCAsan; 03-05-2018 at 08:31 PM.

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