How deep should substrate be?

Discussion in 'Beginner Discussions' started by Matt, 20 May 2008.

  1. Matt

    Matt MASA Contributor

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    Bought some Aragonite. How deep should I make my substrate in my nano?
     
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  3. Mekaeel

    Mekaeel Moderator MASA Contributor

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    personally i prefer keeping it shallow around 2cm deep.
     
  4. Matt

    Matt Thread Starter MASA Contributor

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    A bed that shallow will not result in nitrif/denitrif hey? I think i'll go 2.5 - 3cm
     
  5. LikesFish

    LikesFish

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    Depends do you want to use it for - biological filtration or aesthetic reasons?
     
  6. Mekaeel

    Mekaeel Moderator MASA Contributor

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    well if you looking for a sand bed for that purpouse,5cm IMO
     
  7. Matt

    Matt Thread Starter MASA Contributor

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    Not sure if I want it for biological purposes or just easthetics...

    If its shallow the aragonite will still function to buffer the pH etc?
     
  8. jacquesb

    jacquesb Retired Moderator

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    Matt - what LikesFish means, is "do you want to use the DSB for denitrification purposes" or "just for how it looks"?

    For denitrification purposes, I would suggest to rather go +-8cm deep (if you can)...

    For "how it looks" - go for 2 to 3cm thick...

    To answer your question:
    If it is shallow, then you would NOT get any an-aerobic areas where acids would be formed by the biological process. Only if these acids are formed, then the aragonite would be able to be broken down to buffer the tank....
     
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  9. lanzo

    lanzo Sponsor

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    yip, and it depletes very very slow.
    i did some research on this topic before using it as dsb, and buffer cap is very slow.
     
  10. jacquesb

    jacquesb Retired Moderator

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    And VERY low - not really worth considering aragonite "for it's buffering capabilities".... Rather dose with sodium bicarbonate if you want to buffer your tank. :)
     
  11. Mike

    Mike Retired Moderator

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    Use arogonite around 20 - 30 mm deep, purely for aethetic means, but any sand bed made of any sand will eventually have denitrifying qualities - which are a positive.
     
  12. abgg118

    abgg118 MASA Contributor

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    IF you want a DSB, you'd have to go very deep, otherwise probably around 2cm.
     
  13. snobee

    snobee

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    So is sand better for a DSB than using larger stone sized gravel?
     
  14. LikesFish

    LikesFish

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    I would never use larger stoned sized gravel even for a shallow bed as it will accumulate detritus.
     
  15. Raven

    Raven

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    hi snobee,
    The finer the gravel the better for a dsb. I'm using river sand for this purpose.
    But then you'll have to go a bit deeper than 2 cm....
     
  16. Mekaeel

    Mekaeel Moderator MASA Contributor

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    sand collected from a deserted beach at low tide is fine to use
     
  17. snobee

    snobee

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    Is it ok to have about 4cm of course gravel and then 2cm of sand in the DSB... or will that serve no purpose at all?

    edit: the course gravel being at the bottom.
     
    Last edited: 23 May 2008
  18. Tobes

    Tobes Retired Moderator

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    Use 0.2 - 2.0mm size substrate and make it 6-8 inches deep for best results in denitrification. Don't use coarse coral sand - detrites will build up and cause high nitrates later on and then cyano and then big headache...:wave2:

    This works for normal DSB in a sump or refugium, too deep for your nano - won't look good and you're gonna loose too much space.
     
    Last edited: 23 May 2008
  19. Reef Maniac

    Reef Maniac MASA Contributor

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    It would not have any advantages, and could have quite a few disadvantages (depending on the size and thickness of the course aggregate). I would suggest you only use a well graded, fine sand throughout the sand bed.

    Hennie
     
  20. sihaya

    sihaya

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    Ditto. You can't keep an effective sand bed in a nano tank. Any sand you use will be aesthetic (or perhaps to create another niche for worms/pods/etc.)
     
  21. Alfie

    Alfie

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    Why do you say this Sara
     
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