I used 2 5-lbls bars so 10 lbs total (https://www.amazon.com/dp/B008A3UG9E?ref=ppx_yo2ov_dt_b_product_details&th=1). Just want to reduce some noise and make sure the pellets don't bounce around. I'm on 3.5 Acres so noise is not the main concern. Was not aware the use of denim.