Reef Safe?

Discussion in 'Aquascape Discussion' started by ReeferNtraining, Jan 13, 2019.

  1. ReeferNtraining

    ReeferNtraining Member

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    I purchased this rock from a LFS and now I’m wondering if it’s even reef safe? I can see crystals in it, almost like a granite. Would that mean there are metals in it as well? Thoughts appreciated!
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  2. EmdeReef

    EmdeReef Valuable Member R2R Supporter R2R Excellence Award Reef Squad

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    Looks fine to me, but I can't see what concerns you. Do you know what type of rock this is?
    The dark patches on the left piece could be some decaying matter.
     
  3. ReeferNtraining

    ReeferNtraining Member

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    No, I don’t know what type it is. But it’s solid and dark. Not like typical lightweight porous rock. Seeing the crystals in it is what bothers me. Makes me wonder if there are not other minerals present.
     
  4. norfolkgarden

    norfolkgarden Valuable Member R2R Supporter R2R Excellence Award Partner Member 2019

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    How heavy is it?

    Was it originally meant for a freshwater tank?

    If it is not very porous or has limited surface area compared to the stuff we normally see it won't be nearly as effective in filtering.
     
  5. MikeyA

    MikeyA Member

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    Break off a small piece and stick it on vinegar, that'll tell you if it's calcium carbonate base
     
  6. OutsideBrian

    OutsideBrian Active Member

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    How? What does it do? I too have some pieces of rock I would like to test.
     
  7. MikeyA

    MikeyA Member

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    Basically anything of limestone/calcium carbonate base with a high pH will react to any acid medium. Just break off a small piece of rock and put it in a glass of distilled vinegar 5% preferably and see if it fizzles. Do it on the sink though it can get messy.
     
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