Herbie Overflow?

Discussion in 'General Reef Topics' started by Seano Hermano, Jun 1, 2010.

to remove this notice and enjoy 3reef content with less ads. 3reef membership is free.

  1. Seano Hermano

    Seano Hermano Giant Squid

    Joined:
    Apr 7, 2010
    Messages:
    10,056
    Location:
    Northwest Ohio
    Beneath my DT I want a sump/ fuge combo in a 20g long. (Return in middle using an Eheim 1250)To do this I will need 2 overflow lines. But my question is, with 2 overflows, would I be alright with just one return line?:confused: The Dt is a 55g.

    [​IMG]
     
    Last edited: Jun 5, 2010
  2. Click Here!

  3. Crimson Ghost

    Crimson Ghost Blue Ringed Angel

    Joined:
    Nov 14, 2008
    Messages:
    1,560
    Location:
    Somewhere south of disorder
    Yes, just calculate the GPH you are going to drain and buy an appropriate return pump.
     
  4. ibefishy

    ibefishy Montipora Capricornis

    Joined:
    Jun 9, 2009
    Messages:
    1,021
    Location:
    Ca
    If it helps I use 2 1" id overflow drains and 1 return line. I use a mag12 return pump split 2 ways.
     
  5. Seano Hermano

    Seano Hermano Giant Squid

    Joined:
    Apr 7, 2010
    Messages:
    10,056
    Location:
    Northwest Ohio
    Water only 'overflows' as fast as the return can pump it back to the DT.With 2 overflows, would that rate be split by each overflow? I.E., the Eheim 1250, can pump 320gph max. So, if I have this set at max, would each overflow drain at a rate of 160gph, still at equilibrium?
     
  6. blackraven1425

    blackraven1425 Giant Squid

    Joined:
    Mar 1, 2010
    Messages:
    4,780
    A 320 gph pump won't get 320 gph because of head loss, but the general idea is correct.
     
  7. ibefishy

    ibefishy Montipora Capricornis

    Joined:
    Jun 9, 2009
    Messages:
    1,021
    Location:
    Ca
    Thats true, for example my mag12 is rated at 1200 gph at 0 head loss but with a 3.5' head loss if I remember correct my pump is down around 900 gph.
     
  8. Click Here!

  9. Seano Hermano

    Seano Hermano Giant Squid

    Joined:
    Apr 7, 2010
    Messages:
    10,056
    Location:
    Northwest Ohio
    Yeah I hadn't taken that into account. I will have about 5 ft of head. I was mainly using the rated gph for my variable. This pump can handle 6.8ft of head. At 5ft I should have about 100gph. Is this enough flow? Or should I stay on the safe side and spend the extra $50 on the next size up(the 1260, with a max head of 10ft and max gph of 500)?

    Edit: At 5ft of head with the 1260, I will be able to get 300gph.
     
    Last edited: Jun 1, 2010
  10. Seano Hermano

    Seano Hermano Giant Squid

    Joined:
    Apr 7, 2010
    Messages:
    10,056
    Location:
    Northwest Ohio
    So should I spend the extra money on the 1260, for 3 more feet of head? Or will I be ok with the 1250?
     
  11. Seano Hermano

    Seano Hermano Giant Squid

    Joined:
    Apr 7, 2010
    Messages:
    10,056
    Location:
    Northwest Ohio
    As some of you may have noticed, I changed the thread title. My original questions have been answered & I would like to take this in a new direction. I like the idea & design of the Herbie overflow.

    -In the following link attached, is a video, by BRS, better explaining the design behind the quiet overflow. At time, 2:51, they show the way you can have the overflow if the tank is drilled in back, rather than on the bottom of the tank.
    -http://www.youtube.com/watch?v=6Pv3u0Sa1tk&NR=1
    -At this view you can see that one pipe, being the lower, the main line, is pointed down; the taller pipe, the emergency drain, points up. How does the drain work if it is pointed down? Wouldn't this suck air?
    -I understand the idea of the straight pipe. But that requires holes to be drilled in the tank floor.
     
    Last edited: Jun 5, 2010
  12. reefmonkey

    reefmonkey Giant Squid

    Joined:
    Mar 3, 2010
    Messages:
    4,427
    Location:
    SE South Dakota


    fixed it for ya Seanno