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Mark's Step-Down Tank

Touring Mark's Ultimate 12-Foot Step-Down Aquarium! | Mark Callahan, Mr. Saltwater Tank

In this highly anticipated, part-one episode, Jimmy finally calls out Mark (Mr. Saltwater Tank) to give an exclusive, long-overdue tour of his massive, custom 12-foot Planet Aquariums step-down peninsula reef tank. Built on the second story of a custom home addition, Mark breaks down the insane logistics of building this monster aquarium, structurally reinforcing the floor with steel, and literally craning the massive tank and stand through a second-story window. Discover how he manages and services the unique 4-foot deep drop-off section, the engineering behind the plumbing to the downstairs fish room, and the inspiration behind the real reef rock aquascape, drawing from real-world diving experiences in Vanuatu, Okinawa, and Australia. Whether you are a seasoned reef junkie or just love mind-blowing custom aquarium builds, this behind-the-scenes look at one of the ultimate home reef tanks is a must-watch!

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  • On Sale 20%
    Real Reef Rock Large 8-16" (by the pound) - Real Reef
    On Sale 20%

    Real Reef Rock Large 8-16" (by the pound) - Real Reef

    Real Reef
    $6.99
    $5.59
    "By the Pound" means you are choosing the weight of your rock.  Ex: Qty 5  is 5 Pounds of Rock, NOT 5 Rocks. Selling individual rocks is impossible due to the fact th
  • On Sale 20%
    Real Reef FANCY Branch Rock (by the lb) Box - Real Reef
    On Sale 20%

    Real Reef FANCY Branch Rock (by the lb) Box - Real Reef

    Real Reef
    $13.99
    $11.19
    "By the Pound" means you are choosing the weight of your rock.  Ex: Qty 5  is 5 Pounds of Rock, NOT 5 Rocks. Selling individual rocks is impossible due to the fact that every rock is unique in...
  • On Sale 20%
    Real Reef Turbinaria Cup Plate Coral Rock (1 pc) - Real Reef
    On Sale 20%

    Real Reef Turbinaria Cup Plate Coral Rock (1 pc) - Real Reef

    Real Reef
    $39.99
    $31.99
    ** Each Cup is PHOTO Similar, but Different ** Weight: Approximately 3-3.5 lbsSize: Approximately 8 x 8 x 2.5 inchesEach rock is unique, weight and size may vary. Real Reef Branch Rock is our v
  • On Sale 20%
    (Single FANCY Arch) Real Reef Arches - Real Reef
    On Sale 20%

    (Single FANCY Arch) Real Reef Arches - Real Reef

    Real Reef
    $39.99
    $31.99
    Approximately 8-14" on Average in Length, hand made so all the designs slightly different. Real Reef Arches are Here!  The best looking manmade rock now in Arch form.  Real Reef Rock is our...
  • On Sale 20%
    St. Thomas Mushroom - SAQ Coral Farm
    On Sale 20%

    St. Thomas Mushroom - SAQ Coral Farm

    Saltwater Coral Farm
    $49.99
    $39.99
    St. Thomas Mushroom If you are looking to buy vibrant color coral online to add to your reef tank, this is the best choice. St. Thomas Mushroom coral is a fast growing coral that will reproduce and...
  • On Sale 20%
    Real Reef Rock X-Large 10-16" (by the pound) - Real Reef
    On Sale 20%

    Real Reef Rock X-Large 10-16" (by the pound) - Real Reef

    Real Reef
    $6.99
    $5.59
    "By the Pound" means you are choosing the weight of your rock.  Ex: Qty 5  is 5 Pounds of Rock, NOT 5 Rocks. Selling individual rocks is impossible due to the fact th
  • On Sale 20%
    Purple Mummy Eye Chalice Coral - SAQ Coral Farm
    On Sale 20%

    Purple Mummy Eye Chalice Coral - SAQ Coral Farm

    Saltwater Coral Farm
    $49.99
    $39.99
    On average 3/4" - 1" in size.  If you are looking to start buying coral online to add to your aquarium, this is the best SPS coral. Purple Mummy Eye Chalice Coral is a fast growing chalice that...