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Guys need your help -- Fishtank inflow/outflow rates

  1. Aug 28, 2014 #1
    I need to work out the liters per hour from the diagram I have attached. There are no motors/pumps involved just gravity flowing through a tube. Thanks :thumbs:
     

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  3. Aug 28, 2014 #2

    Nugatory

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    Why not directly measure it? You'll have to do that in any case before you can trust any result that you've calculated from your idealized description of the problem.
     
  4. Aug 28, 2014 #3
    Thanks for your quick reply. How would I go on measuring it?
     
  5. Aug 28, 2014 #4
    I need to get a pump that would pump the same liters per hour as the tube or the tanks will overflow.
     
  6. Aug 28, 2014 #5

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    Fill the top vessel, measure how miuch the level in the bottom vessel changes in a given time?
     
  7. Aug 28, 2014 #6

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    Most reliable and affordable systems use a switch operated by a float to turn the pump on and off as needed to maintain a constant level.
     
  8. Aug 28, 2014 #7
    I haven't yet built it. Its for a rack of aquariums. Is there no formulas to work this out?
     
  9. Aug 28, 2014 #8

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    None that you could trust. Any mismatch between the flow in and the flow out, no matter how small, will build up over time. Have you seen how tropical fish stores handle this problem?
     
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