The Planted Tank Forum - View Single Post - seachem matrix bio best ?
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post #45 of (permalink) Old 02-01-2013, 11:01 PM Thread Starter
Algae Grower
Join Date: Jan 2013
Location: earth
Posts: 63
[QUOTE=lipadj46;2420242]Matrix is a man made expanded media and not pumice.

Its natural stone not man made.
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