What I use is trace mineral salt, Finestock, and calcium phosphate, just mix it 3parts salt, 3 parts salt, and 1 part phosphate. Dig yourself a hole 1 and 1/2 foot deep and 1 and 1/2 foot around. mix the ingredients with the dirt from the hole and place everything back in the hole. I put mine no more than 5 yards off of a trail. I got this off of the buckmasters site. I can assure you that it works, last year I shot a buck and 2 does and all 3 had their heads in the hole when they got the arrow. Hope this helps. ONEMRED