how deep does dsb need to be?

Discussion in 'Biological/Natural Filtration and Deep Sand Beds' started by Hermanus, 16 Aug 2009.

  1. Hermanus

    Hermanus

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    Hi,
    I have decided to put up a 1,8m tank and want to make sure that the filter system is right from the start. My DSB is 39cmX37cm and between 11 - 12cm deep. First compartment will have a protein skimmer with live rock and the second compartment will be the DSB and 3rd compartment the return pump. Is DSB deep enough? I've used arragonite sand for the DSB.
     
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  3. Rory

    Rory Admin MASA Contributor

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    Yes it is only just deep enough. May have to top it up a bit in a year or 2 if the aragonite dissolves a bit.
     
  4. Hermanus

    Hermanus Thread Starter

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    Can I keep it like that, or will it be better to make it deeper now? Is it big enough or too small?
     
  5. Atilla

    Atilla Sponsor

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    dude iwould say 12cm is minimum. 15- 18cm would be better.
     
  6. Hermanus

    Hermanus Thread Starter

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    Do I Need To Put Anything On The Dsb, Like Crabs Or Snails Or Should It Not Be Disturbed? What Do You Guys Think?
     
  7. Nemos Janitor

    Nemos Janitor

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    @Hermanus when you say the DSB is 11-12cm deep is that the depth of the container or the substrate depth? and how deep is the water that flows over the DSB? Also is the 39x37cm the total size of the sump or just the DSB compartment.
     
  8. Hermanus

    Hermanus Thread Starter

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    That Is Just The Size Of The Dsb Compartment. 11-12cm Is The Substrate Depth. The Water Running Above The Dsb Is 25 Cm Deep.
     
  9. Nemos Janitor

    Nemos Janitor

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    Great stuff :thumbup:
     
  10. charlv

    charlv

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    Hi All

    I need some advice on dsb depth 15cm okay but can you go deeper than that sump size 800x450x400
     
  11. RiaanP

    RiaanP Moderator

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    A DSB should be at 15cm for playsand. Or sea sand.

    Water Depth over DSB should be deep enough so that no sand storms are experienced. My Opinion, another 15cm

    The size of the DSB.

    AS BIG AS POSSIBLE

    Look in the Sticky threads under DSB's. Especially the thread from Sihaya.
    Also take into account, the bigger the footprint, the more diversity can exists.
     
  12. FransSny

    FransSny

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    With Riaan on this one. As big as possible.

    problem with deeper DSB's are that they tend to develop "dead spots" deeper down causing aal types of issues
     
  13. charlv

    charlv

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    Thanks for reply RiaanP, dsb size 450x360x350 is this good or bad
     
  14. charlv

    charlv

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    So not the depth but more volume
     
  15. RiaanP

    RiaanP Moderator

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    Sorry
    But you got a 1.8 meter display. And a standard / normal 3 chamber sump (skimmer / DSB / return) And your space for the DSB is only 450mm.
    What else do you have under the tank?
    If skimmer is in the region of 300 and return 200, Then this is only 950. I'm guessing here. So what is under the other half of the tank?

    But for me 450 is to small.
    And I take it that the sand level should only be 150mm deep.
     
  16. charlv

    charlv

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    No RiaanP the display tank 918x600x620 sump size 800x450x400

    I battle to post pic of sump please help so you can see
     
  17. charlv

    charlv

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    [​IMG]
     
  18. RiaanP

    RiaanP Moderator

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    Sorry, Went up and scan beginning and saw Hermanus DT that is 1.8
    (you wish it was you)
    So it is skimmer on the right, DSB, baffle then return

    Can put chemical stuff is the baffle. Or else could remove baffle and move the DSB end glass to the maximum to the left. Just big enough chamber for return pump.

    Then if you do have an auto top up, no problem, as the last chamber is small, and evaporation level will greatly differ. But no Auto top-up (like me - next DIY to do) you can make the DSB end glass lower as well. Then use full area above return PLUS DSB as evaporation level. (20 to 25cm high max.)

    You should start your own thread. Currently you are hidden. And some other members could miss your request.
     
  19. charlv

    charlv

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    Thanks RiaanP So sump is okay for tank size
     
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