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Activated Charcoal

Hello folks,

Does anybody know what exactly does the activated charcoal absorbs?  I came across a few reference books as well as websites that said activated charcoal is no good for a planted tank as it absorbs all the nutrients and trace elements from the water.  On the other hand, there are a few people that use activated charcoal in their planted tanks.

So is there anybody out there that did some researches on what exactly does the charcoal do to the water?


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