Sweet, thanks Bill.

I've been to four nurseries and so far no luck. I've seen lump hardwood charcoal for grilling, it says its 100% natural, but I don't want to take a chance.

There's making my own or buying it online(I'm too cheap, and lazy for either option) So aquarium carbon it is!

Also, thanks for the hint on using fir bark instead of tree fern fiber. Bigfoot's been easier to come by than that stuff.