Doug, I was using small chunks, but there's a new book out on BioChar where they talk about the charcoal in microns.

Which way does the pH go, up? Up, I could use, as my pH is about 5.8.

How do you make it in the 55-gal barrel? I read something about filling the barrel with wood and getting it started, then tipping it over to shut out air intake. Tips?

Sue