Leonardite quantity?

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Apr 24, 2005
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In Tom's non CO2 article he talks about using leonardite in the substrate. What quantity would you normally use? I'd be putting it in an existing tank with Black Onyx Sand.

Thanks, Bill
 

Tom Barr

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Jan 23, 2005
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Re: Leonardite quantity?

1 lb per 10-20 gal or so.

Regards,
Tom Barr