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  1. Member
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      • Native Language:
      • Korean
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      • South Korea
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      • South Korea

    • Join Date: Jul 2010
    • Posts: 116

    meaning of mature

    This is an extract from a manuel and i am not sure what "mature" means in this sentene.

    - ammonia and nitrite concentrations should remain immeasurable in established aquaria with mature biological filtration,

    Please help me.

    Last edited by paris 06; 10-Feb-2011 at 21:15.

  2. Member
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      • Native Language:
      • American English
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      • United States
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      • United States

    • Join Date: Feb 2011
    • Posts: 434

    Re: meaning of mature

    I am not a teacher.

    It means that the living things that clean the water have been there long enough to have formed a stable community.

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