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Plant Roots as Filters

Posted By: Mr Leadfoot <leadfoot@sbcglobal.net>
Date: Tuesday, 17 September 2002, at 1:13 p.m.

Gareth mentioned recently that plants (and their roots?) are excellent filters. Now, I know that plants absorb nutrients, but I always thought that the absorption occurred in the leaves as well as in the roots.

Am I wrong? Does this absorption happen only in the roots? If plant roots are that efficient at absorbing fish waste and food, then wouldn't it be safe to assume that the more roots in the gravel, the better? And, to what extent are they good filterers? Are they comparable to a man-made filter in any way? If so, what type? Powerfilter, sponge filter, etc.?

Thanks.
 

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