Becky has a great description of how to easily create a secure, clean and proper enclosure which IS essential to healing a wound such as the OP is dealing with. Although I do not understand why the feeding part was relevant considering this snake is wounded and already easily feeding on F/t, and is injured so very unlikely to have an easy time with live prey if not absolutely necessary (which it is not). I did not know the OP had pebbles in the tank, but the OP also has already been told to use paper towel and sanitize the tank entirely.