I have been using Rex fir bark as a big part of my potting medium but I live in Virginia where it is hard to find and very expensive if I do. I am wondering if there are any major difference between fir bark and regular old pine bark. The quality of pine bark that I have found here is absolutely horrible in my opinion, it is either way to large of a nugget or it is just shredded to bits with a lot of wood in it to include cambium. To sterilize as much as I need is almost crazy to consider. What do you think I should do?