(Qty1=1lb) Hardwood Fuel Pellets are used as one of the two main ingredients in my substrate mix for Oyster Mushrooms on supplemented wood blocks. My trusted Michigan supplier dose not ever use antifungal woods such as Walnut. Stay away from wood shavings used for horse beding. If you have questions on dry ingredient rations or water ration email: FunGuy@MycoMitch.com. Local purchase and pickup/delivery available.