Sump DSB question

Discussion in 'General Discussions and Advice' started by martinhal, 12 Jan 2009.

  1. martinhal

    martinhal

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    Hi All,


    My sump is divided into 3

    1. Skimmer outflow
    2. DSB
    3. Retun to tank

    While doing a water change over the weekend I noticed that with all the pumps off the water level in compartment 1 drops thus there is a leak between 1 and 2. With the pumps on the water flows over the top thus indicating a small leak.

    My question is - does this small leak affect the performance of the DSB ?
     
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  3. dallasg

    dallasg Moderator MASA Contributor

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    for a dsb to work optimally the flow must be across the sand, not thru, so if while the pumps are running the sand is not being disturbed, its should be fine.
     
  4. RiaanP

    RiaanP Moderator

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    Depends on how fast it drops.

    Anyway you can not fix it, have to empty the sump and you will kill the DSB.
    So accept it and ignore it.:(
     
  5. dallasg

    dallasg Moderator MASA Contributor

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    worst case, is where the leak is, and if its a fast flowing leak, which i doubt as water will take the path of least resistance which is the overflow, that area of the dsb might be not as active as other parts
     
  6. martinhal

    martinhal Thread Starter

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    Thats what I was hoping !! That is fine as long as the pumps are on , what worries me is when the pumps are off and the o2 rich water gets into parts of the dsb.

    I think what I must do is dump some very fine arrogonite in compatment one too and make that part of the DSB. May have to replumb the skimmer outlet.. fun fun fun..:(
     
  7. dallasg

    dallasg Moderator MASA Contributor

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    not such a bad idea, but it shoouldnt be neccessary, coz if the pumps stop the flow will too, and the amount that will seep thru shouldnt do any damage
     
  8. martinhal

    martinhal Thread Starter

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    Problem solved !! It was not a leak after all. I have a small pump from the return compartment to compartment 1 - so when the pumps are off it causes a siphon..... sorry my bad. Thanks for all the input.
     
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