1. Welcome to The Salty Box, a forum to discuss everything related to Marine & Reef Fish keeping in a friendly surrounding.

    Your voice is missing! You will need to register to be able to join in discussions with others.

    We hope to see you as a part of our community soon

    Dismiss Notice

Deep Sand Beds Explained

Discussion in 'Filtration / ULNS' started by Realist, Mar 21, 2010.

Thread Status:
Not open for further replies.
  1. Realist

    Realist Registered

    Joined:
    Jun 18, 2009
    Messages:
    25,346
    Likes Received:
    88
    Deep Sand Bed – Deep sand beds make excellent nitrate reactors. The way they work is that the deepest portions of the gravel do not receive replenished oxygenated water and become anoxic. This causes the bacteria to use a nitrogen molecule as an electron receptor instead of an oxygen molecule, and the result is the bacteria electrically transform the nitrate molecule (NO3) into nitrogen gas (N2).
    The gas is partially dissolved in seawater but then is quickly released into the atmosphere as it hits the water surface.

    DSB’s are extremely efficient nitrate reactors and can handle very large loads, perhaps 5-10 times greater than live rock alone. In-tank DSB’s have lost popularity due to misunderstood maintenance practices.
    Modern day DSB’s place the sand bed external to the display tank. These are typically sumps deep filled with sand and drilled with two bulkheads on opposite sides of the top of the container. Water passes over the top of the gravel bed just like an in-tank DSB. Nitrates permeate to the bottom of the gravel bed and are assimilated by anaerobes.

    Written by Killi (Pete)
     
Thread Status:
Not open for further replies.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice