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Active carbon and trace elements?

I read somewhere that active carbon absorbs the trace elements that are so
necessary for healthy plant growth.

Is this statement true? Are there any scientific data to support it? Does
anyone have references to literature or websites on the relationship between
active charcoal and trace elements?

If active carbon does absorb the trace elements, what do people on this list
use in stead of active carbon to eliminate toxic substances (besides the

Any suggestions?

Davy Cleys
An aquarist from Belgium, Europe