Duck, what are some of the other things I can use? Can I mix the carriers...say like some wood shavings, some bran meal, some kelp meal, etc? I do have wood shavings--been planing some pieces of (well aged) pine to make a butcher block top for an island. And I usually can get chips from chain saw leavings. I thought that I had read somewhere that wood chips were not as good as a lot of other things. I will be in the big city tomorrow or Thursday and could get some wheat bran....but don't really want 50# of it.