Which Substrate to use? Aragonite, Crushed Coral, Playsand

Discussion in 'Biological/Natural Filtration and Deep Sand Beds' started by highlander, 27 May 2008.

  1. highlander

    highlander

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    Hi Guys,

    I am starting a new marine tank and planning to get crushed coral (fine) in the main tank and play sand in the sump for dsb.

    Some people say that one should only go for aragonite, but wont crushed coral do as well? Also is playsand good for a DSB in sump?
     
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  3. jacquesb

    jacquesb Retired Moderator

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    Howzit Highlander! IF your crushed coral sand particles are smaller than 1.5mm, then it should be 100%.... BUT, if not - then go for either playsand OR aragonite in the main display.

    Playsand is MORE than perfect for use as a DSB in the sump.....

    A DSB is (according to me) 120mm to 150mm deep....
     
  4. highlander

    highlander Thread Starter

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    So I suppose it is okay to have a bottom layer of playsand in the main tank and another layer of crushed coral over it... Also where can i get good playsand that is inert? reggies? pool places?
     
  5. jacquesb

    jacquesb Retired Moderator

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    I got mine (I have some in my in-sump DSB) from Builder's Warehouse.... Most people get their's from Reggies or Toys-R-Us....

    The pool place will most likely sell you pool-filter sand - slightly bigger sand particles, but it should still work.

    How big is the crushed coral particle? The reason for not suggesting the use of crushed coral, is that if the crushed coral particles are too big, detritus just accumulates in between them, causing too high nitrates and phosphates in the tank....
     
  6. Rock pool

    Rock pool

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    Jacquesb, what would you recommend cleaning the playsand in? normal tap water?
     
  7. highlander

    highlander Thread Starter

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    Im not sure yet... the lfs i asked said they have fine, medium, coarse so i will have to take a look... if the fine is still too big then I may put a playsand layer below it.
     
  8. jacquesb

    jacquesb Retired Moderator

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    Hi RockPool - Well - that's what I used to clean the playsand with..... Just let the sand drain ALL the water out... the little bit of residual water that stays in there should not cause any problems...

    BUT - just ensure that you rinse it VERY well beforehand...
     
  9. Rock pool

    Rock pool

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    Cool Thanks
     
  10. Mekaeel

    Mekaeel Moderator MASA Contributor

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    ok the way i rinsed my playsand out was first with tap water then the last wash 2 washes with RO,then left it to dry before adding it
     
  11. Warr7207

    Warr7207

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    PS: You will have to wash it 15-20 times to get it pure white ;)
     
  12. Matt

    Matt MASA Contributor

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    I replaced mine with aragonite, much whiter and didn't need cleaning :D
     
  13. Warr7207

    Warr7207

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    Ja but you rich :whistling:
     
  14. lanzo

    lanzo Sponsor

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    but its a nano, one bag to fill it up
     
  15. Matt

    Matt MASA Contributor

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    haha :p

    I've actually got another 18kg bag of Caribsea Seaflor special grade aragonite if anyone is interested?
     
  16. Matt

    Matt MASA Contributor

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    *cough* i'm sorry mr 700L tank is it?
     
  17. Warr7207

    Warr7207

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    See I am right, he so rich he bought extra :whistling:
     
  18. lanzo

    lanzo Sponsor

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  19. Matt

    Matt MASA Contributor

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  20. Warr7207

    Warr7207

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    Check who is trying get to the 1000 post mark :lol:
     
  21. lanzo

    lanzo Sponsor

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    just one more you can do it
     
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