Identify: whats This

Discussion in 'General Aquatic Talk' started by ziyaadb, Jul 26, 2007.

  1. ziyaadb
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    ziyaadb Algae harvester

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    I was told this is coral, Is it?
    If not what is it and what can it be used for?

    [​IMG]

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    Last edited by a moderator: Apr 11, 2014
  2. Alwyn
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    Alwyn Algae harvester

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    It is indeed... I'm not expert so I can be wrong... It can be used to up your Carbonate Hardness the same as Oyster Grid... but again, I can be wrong...
     
  3. Pedro
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    Pedro Algae harvester

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