Using white clay in tank?

Discussion in 'Anything DIY Related' started by reefer101, 13 Apr 2015.

  1. reefer101

    reefer101 Archangel

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    Hi anyone used white clay to sculpt base rock?
    Is it safe to use after baking in oven?
     
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  3. viper357

    viper357 Admin MASA Contributor

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    White clay as in the modelling clay? Not sure if it's the same type of stuff, but for proper clay to become water proof it has to be fired in an oven/kiln at something like 700 degrees Celsius.
     
  4. NO3

    NO3

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    ya needs to bake at 1100 C
     
  5. OP
    reefer101

    reefer101 Archangel

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    Thanks for the help guy I guess I'll be skipping this idea
     
  6. Mr Dan

    Mr Dan

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    Hi @reefer101 Ive done a bit of reading on the subject of home made base rock, this is basically what Ive learnt ,most bio rock that we buy is basically coral sand mixed with portland cement at a mix ratio of 1/6 .Now we all know that coral sand is calcium carbonate aka calcitic lime which we can purchase @ around R60 a 50kg bag from any animal feeds co. you may ask yourself the question of how do they get the tiny holes in the rock.Easy answered.Just before you pour your mix into any moulds you first mix in large quantities of rock salt. the following day you remove the now formed rock out of the mould and place it in fesh water .The rock salt is then dissolved by osmosis ,leaving the tiny holes in the rock .You will only start your cycle once the water no longer contains salt (obviously you have to change the water a few times)good luck desiging you own scape . Any comments on this idea welcome
     
    Last edited by a moderator: 26 Nov 2015
  7. jimilutz

    jimilutz

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    You need to cure your rock for at least 2 months. While the concrete is curing it gives off calcium hydroxide which causes pH spikes. Google the Bioshpere project and what went wrong for an example of concrete curing maladies.
     
  8. Mr Dan

    Mr Dan

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    ok cool , just read it, also very interesting maybe we could somehow get @Paulb to comment on this ,most of his base rock is cement
     
    Last edited by a moderator: 26 Nov 2015
  9. OP
    reefer101

    reefer101 Archangel

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    Thanks guys
     
  10. jimilutz

    jimilutz

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    Nothing wrong with cement rocks, they just need to be well cured.
     
  11. Nemos Janitor

    Nemos Janitor

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    The methods of trying to create surface area in synthetic rock for bacteria, is rather amusing.
     
  12. Paul B

    Paul B

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