Old guy new member

Discussion in 'Say Hello!' started by Harry Ehlers, Sep 9, 2015.

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  1. Harry Ehlers

    Harry Ehlers Plankton

    Joined:
    Sep 9, 2015
    Messages:
    1
    Hi,
    My name is Harry. I have a 220 FOWLR and am setting up a120 reef (hopefully)using old school plenum method.
     
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  3. Corailline

    Corailline Super Moderator Staff Member

    Joined:
    Sep 8, 2010
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    19,652
    Location:
    It is a dry heat, yeah right !
    Hi Harry,

    Oooooo Plenum you're taking me back to my college days, Jaubert, wow long time ago.

    Welcome to 3reef. :)
     
  4. civiccars2003

    civiccars2003 Great Blue Whale

    Joined:
    Mar 18, 2010
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    Location:
    Akron Ohio
    Can you explain Plenum to me as I probably wasn't even born when this design was around. Haha. Hope I'm not offending.
     
  5. Va Reef

    Va Reef Giant Squid

    Joined:
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    Chesapeake, Va
    Basically it's a very DSB with a layer of open water under it (this layer is referred to as the plenum, typically 2-3 cm in height).

    The main theory is that this plenum provides a barrier of low, but still present dissolved oxygen, sandwiching the DSB which has no dissolved oxygen, against the actual display part of the tank which is very rich in dissolved oxygen. This sandwiching prevents the build up of hydrogen sulfide which is a common problem with DSB. It has something to do with denitrification by the anaerobic and aerobic bacteria. Due to the immense layer of sand, these systems can often be run with no live rock at all. Some will even say that a protein skimmer is not necessary.
     
  6. oldfishkeeper

    oldfishkeeper Giant Squid

    Joined:
    Aug 13, 2012
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    7,660
    Location:
    Cincinnati
    welcome to 3reef! sounds like you have a plan - would love to see pictures of your FO.