The ideal pump (flow rate for a tank)

Discussion in 'Pumps and Waterflow' started by Mischif93, 16 Mar 2015.

  1. Mischif93

    Mischif93

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    So I've tried looking around on the internet and I'm struggling to find an answer.

    I'm busy starting a marine tank (busy getting all the hardware at the moment), and there is something I would like to know.

    In terms of return pumps, how do you calculate what is the ideal pump for your tank (in terms of flow rate)?

    So if your tank is X litres then you will need a return pump that pumps Y litres per hour (hope that makes sense, math wasn't my strong point :biggrin:).

    Any help appreciated, really would like to know some form of calculation that I could use to calculate what pump for what size tanks.
     
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  3. TaahirS

    TaahirS MASA Contributor

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    You want an hourly turnover of 20-40 times your tank volume.
     
  4. Bflynn

    Bflynn

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    Is the return pump responsible for all that turn over? Do circulation pumps add to your over all turn over?;)
     
  5. Keegan1

    Keegan1

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    That means i need to get myself a pool pump this weekend lol. i have about 8 times turnover through the return pump but 30-40 times turnover through the wavemakers.
     
  6. TaahirS

    TaahirS MASA Contributor

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    Oh jeez. Sorry, thought you meant total turnover:lol:
     
  7. Mischif93

    Mischif93 Thread Starter

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    Thanks for the responses, so I take it that a pump with a flow rate of 3000L/Hr would not be suitable for a tank of approx 500L.
     
  8. RiaanP

    RiaanP Moderator

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    Depends on your filtration option.

    Also you want excess food and fish poo to actually be in suspension long enough to go down the overflow.

    If you got a DSB, the width of the sump is also important. You need good strong flow over the sand. The wider the sump, the bigger pump is needed. Looking at a water head height over last divider of between 6 and 10mm.
     
  9. dallasg

    dallasg Moderator MASA Contributor

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    Any pump that can take water from your sump to tank will do, but depending on where your sump is in relation to your tank a 3000lph pump should do
     
    NO3 and butcherman like this.
  10. butcherman

    butcherman Moderator MASA Contributor

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    Yes you want to look at head high. And also power consumption vs cost.
     
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  11. NO3

    NO3

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    So on a 1000L system i need a 20000lph pump?:m23:

    on my tank, just under 1000L i use a 3500LPH

    The Eco Drifters do the circulation work in the actual tank!

    LBH your skimmer is not consuming more than 2000lph so whats the point of circulating 20 -40 times per hour!
     
  12. TaahirS

    TaahirS MASA Contributor

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    I did rectify myself afterwards...
     
    Last edited: 17 Mar 2015
  13. Bflynn

    Bflynn

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    Some folks like to match the return lph with the skimmer lph.
     
  14. Mischif93

    Mischif93 Thread Starter

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    Thanks all, loving all the advice.
     
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