The Planted Tank Forum - View Single Post - Best black cap for dirt tank?
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post #2 of (permalink) Old 10-03-2012, 07:08 PM
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Join Date: Jul 2012
Location: NW Indiana
Posts: 623
i used a cheap black sand that i found majorly discounted at a lfs, and it still looked pretty least more than black gravel or eco complete.
if you are capping dirt, I think sand would probably be your best option. anything larger might let some of the mud seep out....and trust me it gets messy quick.

though keep in mind; if you like to shuffle plants around a lot, a sand/dirt substrate may not be your best bet
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