I have a small bag of fir bark, the kind some people use for some species or reptile. Can I use this for my different species of burrowing roaches? I also have access to peat moss & just trimmed/green oak leaves, just trimmed cherry tree leaves, just trimmed willow leaves & tons of grass, clover & dandelion so Im thinking of a combo of all of these. I dont have access to rotting oak leaves. I tried doing a search on this forum for "fir bark" but the engine kept saying I was using too small of a word. Kim