What rock is this?

Discussion in 'New Members' started by Fenton, 24 Feb 2014.

  1. Fenton

    Fenton

    Joined:
    22 Sep 2013
    Posts:
    91
    Likes Received:
    4
    Location:
    Randburg
    Hi fellow reefers,

    Hope all of your tanks are thriving!!!

    I was under the impression that this is lava rock but now im not sure,

    what rock is this?I've been googling but cannot find a pic of this rock anywhere,guy I got this from said he had this in his reef tank.

    Do you think this will be harmful to my new set up,going to use normal LR as well with this.

    Reply's appreciated

    Regards

    photo.JPG_ROCK.jpg

    photo.JPG_ROCK.jpg
     
  2. AdS Guest




    to hide all adverts.
  3. irie ivan

    irie ivan MASA Contributor

    Joined:
    6 May 2007
    Posts:
    3,149
    Likes Received:
    171
    Location:
    Bracken
    Really difficult to tell for sure from a picture, but looks very similar to what is referred to as alphagrog, i.e. Ceramic rock which is very porous and inert.
    Imitation lava rock...
    It has a huge surface area, which essentially means huge real estate for bacterial colonization.
    Problem is that most of the surface area will house aerobic bacteria...
    Great for trickle filters, supplementary rock.
    As a total replacement for liverock... I'll pass.
     
  4. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,142
    Likes Received:
    1,228
    Location:
    Centurion
    I got it as lavarock
    Got 2 big pieces myself. Will use them as base rock.
     
  5. NO3

    NO3

    Joined:
    26 Jul 2013
    Posts:
    592
    Likes Received:
    30
    Location:
    Durban,Hillcrest
    That looks like the rock that steam trains dump, We use it alot for bonsai!
     
  6. Fenton

    Fenton Thread Starter

    Joined:
    22 Sep 2013
    Posts:
    91
    Likes Received:
    4
    Location:
    Randburg
    I was just thinking of using this as a base and load up with normal LR,just don't want anything leaking out of the rock into my system ,eg metals,chemicals etc
     
  7. irie ivan

    irie ivan MASA Contributor

    Joined:
    6 May 2007
    Posts:
    3,149
    Likes Received:
    171
    Location:
    Bracken
    If what i suspect...
    Byproduct of the glass industry, inert, shouldnt leach
     
  8. DrStroh

    DrStroh

    Joined:
    31 Jan 2011
    Posts:
    11
    Likes Received:
    0
    Location:
    Jo'Burg
    I agree with NO3, it does look remarkably like that exact same rock used in Bonsai.;)
     
  9. Midnight Reefer

    Midnight Reefer

    Joined:
    8 Aug 2013
    Posts:
    346
    Likes Received:
    7
    Location:
    no comment
    Irie is right, its an artificial creation
     
  10. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,142
    Likes Received:
    1,228
    Location:
    Centurion
    Perfect for base rock.

    I got 2 or 3 of them. It is very porous.
     
  11. Fenton

    Fenton Thread Starter

    Joined:
    22 Sep 2013
    Posts:
    91
    Likes Received:
    4
    Location:
    Randburg
    Thanks for the replies guys
     
  12. Moolis Moolman

    Moolis Moolman Pet Stop SA Sponsor

    Joined:
    15 Dec 2007
    Posts:
    2,908
    Likes Received:
    88
    Just test for iron first - when I was in the tyre trade we used the factory's furnace "rock" for our freshwater aquariums, extremely effective and cheap. But due to excessive iron leaching out of the rock I was forced to remove it. :(
     
  13. Bflynn

    Bflynn

    Joined:
    30 Oct 2012
    Posts:
    663
    Likes Received:
    17
    Location:
    Worcester
    Ive seen same looking stuff at brick manufacturers. Left over ash and clay and stuff melted together in the ovens. I have a pile of it at work.
     
    Last edited: 19 Mar 2014
  14. sharktail

    sharktail

    Joined:
    28 Mar 2014
    Posts:
    100
    Likes Received:
    3
    i think it is used for "coles" on gas braais.
     
  15. Bflynn

    Bflynn

    Joined:
    30 Oct 2012
    Posts:
    663
    Likes Received:
    17
    Location:
    Worcester
    This rock is what is left over from coal furnaces "bottom ash". I went to get a few big pieces from the ash pile at work. Just from looking at the rock I can see calcium, clay and what looks like small pieces of rusty steel. I grabed a magnet and ran it over some fine dust from the rock. It picked up allot of tiny pieces of debri. It must be iron! Im no geologist:p but that cant be good. I also read up a bit on bottom ash. Bottom ash may or may not be toxic, it can have various toxins in it depending on where it was mined. I would not use it unless you can send it to a lab and test composition. Or do some research on bottom ash and the rocks you got. If you do find out that bottom ash is safe I would like to know. Bottem ash and fly ash are both a bi product of coal burning.
     
    Last edited: 11 Apr 2014
  16. Bflynn

    Bflynn

    Joined:
    30 Oct 2012
    Posts:
    663
    Likes Received:
    17
    Location:
    Worcester
    Today I noticed that some more off these "bottom ash rocks" on our ash pile at work. Some of these rocks are huge pieces, some nice flat pieces, all sorts of nice shapes for aquascaping. So I have been trying to research these "rocks" a little more. It seems it is a gamble using in an aquarium.

    Has anybody used these "rocks" before? Is it possible to make them safe for tank use?
     
  17. Ants1970

    Ants1970

    Joined:
    1 Aug 2014
    Posts:
    6
    Likes Received:
    0
    Wow, interesting do you used it crushed for absorption or to feed the tree ?
    I have quite a few bonsai and would be keen to know.
     
Recent Posts

Loading...
Similar Threads - rock Forum Date
Growing behind rock ID Needed Friday at 06:13
[wtd] Long / flat rock ( live or dry) Wanted Monday at 17:14
[wtd] Liverock needed for this week saturday - 25 kg Wanted 24 Nov 2016
Live rock changing white General Discussions and Advice 22 Nov 2016
[wtd] Dead rock Wanted 16 Nov 2016
[wtd] LIVE ROCK Wanted 7 Nov 2016
Help to ID live rock growth ID Needed 5 Nov 2016