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Re: NFC: light bulbs and tannins

	NO! Briquettes are wood shavings and sawdust mixed together with
tar. Very little coal (if any) in briquettes. That's why they recommend
that you do not start cooking until they are uniformly gray. It's probably
poisonous for fish.

On Fri, 19 Jan 2001 mdb6850 at tamug_tamu.edu wrote:

> I see a recommendation of using charcoal for clearing up water. 
> Can your ordinary backyard barbecue briquettes be used as filter 
> carbon? Should they be crumbled first and what are the opinions 
> on application in saltwater tanks?
> Matt