Charcoal for filters

Discussion in 'Grow Room Design/Setup' started by RecStoner, Nov 19, 2012.

  1. What do you guys use for your air filters? What's the best bang for your buck?

    I just used the last of my aquarium charcoal and need some more.
     
  2. Activated Carbon. You can get it at Pet Smart or any other pet store.
     

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