Flow rates

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

  1. flappy

    flappy

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    Can anyone advise how fast water should flow over a DSB?
    Also how many litres does a return pump need to pump as % of total water volume.
    (how many times do you need to turn your total water volume,through your sump)
     
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  3. Jaak

    Jaak

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    Around 3 - 4 times would be just right.
     
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    flappy

    flappy

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    Is this the amount through your sump or through a DSB or both? assuming you have your DSB in your sump.
    Was told you needed 5 to 10 times your total water volume through your sump,just wanted to verify.
    I have a DSB in my main sump and another remote DSB.
     
  5. Kanga

    Kanga Retired Moderator

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    Spot on, 3 maybe 4 times the volume of the sytem
     
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