DSB

Discussion in 'General Discussions and Advice' started by jono, 15 Nov 2014.

  1. jono

    jono MASA Contributor

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    Hello Fellow reefers.

    something I have been thinking about over the last month or so. my DSB I have had it since I started my four foot tank and for the last 6 months I have been battling with my Nitrates. some one gave me an idea of taking a 20mm pvc pipe and drill a hole 10mm from the bottom and blank off one end and slowly push it is the sand and leave it in there and this will allow the bad gasses to release which will assist me with my nitrates.

    so I would like to know your thoughts.

    or for me it is out with the dsb and I will fill the chamber with live rock and will turn a portion of the chamber into a refug.

    let me know your thoughts as my corals are fine but I know they could be better.
     
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  3. irie ivan

    irie ivan MASA Contributor

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    How would bad gasses allow in assisting with nutrients?
    Your dsb is a nutrient sink, either undersized and now releasing from its nutrient pool, or hasnt fully kicked in, or is being run incorrectly.
    Tank age?
     
  4. jono

    jono Thread Starter MASA Contributor

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    my tank is 2 years old and was running excellent up until 6 to 8 months ago. the funny thing is my phosphates are low. had it tested at a shop to confirm my tests. undersized doubt as It was fine for a year and a half. what sand I have is play sand as I was told it is perfect for dsbs
     
  5. irie ivan

    irie ivan MASA Contributor

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    Dsb dimension vs tank base dimensions?
    Ie footprint of dsb as a % of tank base?
    Nutrient sinks take a while to "overflow"
    Bioload? Flow rate over dsb?
     
    Last edited: 15 Nov 2014
  6. jono

    jono Thread Starter MASA Contributor

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    my dt is a standard 4 foot. my sump is a 3 foot with three chambers. if I recall my dsb is 330 by 300 by 250 high the return pump is a 5000lt per hour and it runs the chiller and the return. I had spoken to a guy regarding this and he informed me I should put live rock ontop of the dsb to slow the water over the sand
     
  7. jono

    jono Thread Starter MASA Contributor

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    I have 10 fish in my tank with a blue lobster and corals softies, lps and monti's and 2 gorgoniums
     
  8. jono

    jono Thread Starter MASA Contributor

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    this is my new sump design that I am making next month do you think it would be better

    sump design.jpg
     
  9. EFJ

    EFJ MASA Contributor

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    For a DSB to be effective it should be close to or the same surface area of the display tank. Also it should be at least a 150mm deep with about 100 to 150mm deep water layer above it (hope this make sense) with a medium flow of water running over it.
     
  10. RiaanP

    RiaanP Moderator

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    You got a standard 4 foot tank, they are 45cm wide. Total 5400 square cm.
    Your DSB is 33 by 30cm, total 990 square cm

    Percentage DSB to display is 18%. That is a small DSB and it would not be able to handle your tank as the tank matures. Fish gets bigger, eat more...
     
  11. RiaanP

    RiaanP Moderator

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    Do you ever siphon the top of the DSB? A small piece a week?
     
  12. leonspanner

    leonspanner

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    If we're you I get rid off a deep sand bed it is one big headache
     
  13. RiaanP

    RiaanP Moderator

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    I've been running a DSB system for many years. So far so good. Fits in with my laziness.... :) if you want to call it that. But I'm out a lot as well, especially last year. So it does fit in with my lifestyle.

    If you prevent excess settlement on top of the sand, either by increasing the flow rate, or by siphoning parts of it clean weekly. You will already see better results. I siphon only my first of the 3 DSB I'm running. The remote in the garage, I do nothing.

    SO yes, different strokes for different folks. Before you rip out what you got on one Saturday afternoon, first investigate what other options you have. And the initial cost to install it, plus the costs to maintain it.

    Anyway, as I already said, your DSB of 18% is by far too small to be really effective, especially as your fish grow in size and population. You need a bigger DSB or a remote add on DSB. Other options like Seachem Matrix or Orca Cubes or NP Pellet reactors will work out better, if you cannot extend your DSB.
     
    Last edited: 23 Nov 2014
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  14. TaahirS

    TaahirS MASA Contributor

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    What percentage dsb should you aim to have?
     
  15. RiaanP

    RiaanP Moderator

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    as big as possible.

    Smallest compared to tank I run successfully was 33%, but then again, my bio-load was not excessive.

    50% and up is better. Also flow across is important. Good strong flow is important. Aim to have a 6 to 10mm water head in the sump.
     
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  16. TaahirS

    TaahirS MASA Contributor

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