If you want something cheap that works great go to Walmart and buy some of the spray you use to get rid of lice. It used to kill lice and mites on your floor, bed, and other furiture. Take your snake out and put him in a pillow case or something. Clean the aquarium out and put in new substrate. Then spray everything in the cage including water dish and hide even substrate. Let it sit for 24 hours and then let him back in. The small amount of spray that did not evaporate in those 24 hours is enough to kill the mites that are still on him. This works better than most products that you can order for herps and is a lot cheaper, not to mention you can get it at your local department stoor.