Aragonite / Sand for Reef Tank

Discussion in 'General Discussions and Advice' started by MichelleVDM, 7 Jun 2015.

  1. MichelleVDM

    MichelleVDM

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    Hi all, hope you are all well?
    I have recently purchased a new tank to replace my TL550 (will be using the TL) as a hospital tank). Anyhow, the new tank is 2400 x 800 x 800 and i am busy planning to start this tank up. My TL has very fine Aragonite. Now my question for the new tank is Aragonite or Crushed Coral? Also i have looked at the Arag live... what are your opinions on it as well as the colour variants? (Fiji Pink, Bimini Pink, Indo-Pacific Black and Bahamas Oolite)
     
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  3. TaahirS

    TaahirS MASA Contributor

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    Colour is personal preference. Go with a finer substrate. But not sugar fine so it gets blown around. Definitely not crushed coral.
     
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  4. Nemos Janitor

    Nemos Janitor

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    Why?
     
  5. TaahirS

    TaahirS MASA Contributor

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    Traps detritus and is a lot of maintenance. You need to syphon it clean and in a big tank like yours it will end up being a schlep. Ask @Jamie about crushed coral.
     
    Last edited by a moderator: 26 Nov 2015
  6. Nemos Janitor

    Nemos Janitor

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    I am confused. On a granular size of 1mm how is crushed coral more prone to cause detritus than aragonite?
     
  7. TaahirS

    TaahirS MASA Contributor

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    1mm sand forms a nice flat area with no holes. There are lots of nooks and crannies for detritus to get stuck in with crushed coral because there are gaps in between the individual pieces.
     
  8. Nemos Janitor

    Nemos Janitor

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    That is nonsense my friend.

    By the way, what color is aragonite? and what is it,s shape?
     
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  9. TaahirS

    TaahirS MASA Contributor

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  10. Nemos Janitor

    Nemos Janitor

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    How does that differ from crushed coral?
     
  11. TaahirS

    TaahirS MASA Contributor

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  12. Nemos Janitor

    Nemos Janitor

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    In choosing a substrate one needs to weigh up the pros and cons.

    If one is concerned about detritus trapping, then no substrate should be used. Granular size and shape can limit this.

    If one wants to use the substrate as a filter (DSB) then carbonates that do not clump easily are recommended.

    If the substrate is to buffer KH and pH then that is another issue. Then substrates like aragonite, crushed coral and calcium carbonate should be considered.

    Note that the fancy colored substrates are not aragonite. In fact some are very low in aragonite and some contain high levels of magnetic components.

    There is a article on substrates Neil did some years ago. Not that I agree 100s with it, but mostly worth a read.
     
  13. MichelleVDM

    MichelleVDM Thread Starter

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    So the Arag Live in the black etc is not all Aragonite?
     
  14. Nemos Janitor

    Nemos Janitor

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    This is coral sand that has been sived for size. Looks about 3-8mm.





    The granular sizes are not the same.
     
    Last edited: 7 Jun 2015
  15. Nemos Janitor

    Nemos Janitor

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    Correct, Not all aragonite.

    But that does not mean that it should not be used. I have the gray/black in one of my tanks. Tank doing OK. Just have to be careful not to pick up magnetic bits on the magnet cleaner.
     
    Last edited: 7 Jun 2015
  16. Nemos Janitor

    Nemos Janitor

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