The Planted Tank Forum - View Single Post - seachem matrix bio best ?
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post #11 of (permalink) Old 01-31-2013, 06:21 AM
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Join Date: Jan 2012
Location: Oakland, CA
Posts: 2,318
huh, I haven't seen it in person yet, but the pics I pulled up on google image do look a lot like pumice...

You can get a bag for a couple dollars in garden centers and such. Not real sure what they use it for (maybe similar to perlite and such).
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